【LIVE互動英語：20260105】物理科學素養：牛肉為什麼會出現彩虹色澤？ — Transcript

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1. 0:01[music]
2. 0:12Heat. Heat. [music]
3. 0:20[music]
4. 0:30>> [music]
5. 0:35[music]
6. 0:36>> Welcome to Live Interactive English. I'm
7. 0:39Sydney.
8. 0:40>> Hello everybody. I am Shane. And today
9. 0:43we're looking at a topic called When
10. 0:47Beef Shows Rainbow Colors.
11. 0:50>> Wow.
12. 0:51>> Okay. So, um, in this article today,
13. 0:55>> they're going to be talking about beef
14. 0:58showing rainbow colors and that this is
15. 1:02good
16. 1:03>> apparently. So,
17. 1:04>> this is healthy
18. 1:06>> and this is okay,
19. 1:07>> completely normal.
20. 1:08>> But I don't know. See, the problem is
21. 1:10I'm a vegetarian.
22. 1:12>> So, it's not that often that I'm
23. 1:14standing or sitting in front of beef and
24. 1:17I'm about to eat it. But, I mean, I see
25. 1:20it enough and I there was a time when I
26. 1:22wasn't a vegetarian and I don't remember
27. 1:26having rainbow colored beef. You know, I
28. 1:30have to tell you, as someone who's not a
29. 1:32vegetarian and as someone who frequently
30. 1:36uh indulges in eating lots of meat, I
31. 1:39love beef noodle soup and hot pot and
32. 1:42burgers. I have never seen rainbow
33. 1:45colored beef.
34. 1:47>> But you know what it sounds like? If I
35. 1:49do come across uh brightly colored
36. 1:52rainbow colored beef, I shouldn't be
37. 1:54alarmed.
38. 1:54>> Well,
39. 1:55>> I should welcome it. apparent certain
40. 1:57certainly not intuitive that this is
41. 2:01okay. So to me I would be afraid but
42. 2:04apparently we shouldn't be. And why
43. 2:07don't we get into the article and find
44. 2:09out why we shouldn't be afraid of
45. 2:11rainbow colored beef.
46. 2:13>> Absolutely. I can't wait to find out why
47. 2:14it's completely safe to eat. [laughter]
48. 2:16>> Okay, let's do it.
49. 2:19[music]
50. 2:25Have you ever ordered a bowl of beef
51. 2:27noodles and seen strange green or
52. 2:29rainbow colors on the meat? Don't worry,
53. 2:32it's not spoiled. This colorful display
54. 2:35is completely normal and the meat is
55. 2:38safe to eat. So, [music] what causes
56. 2:40these unusual colors? The rainbow effect
57. 2:43happens because of something called
58. 2:45light [music] defraction. When meat is
59. 2:48sliced with a sharp knife, the cut
60. 2:50creates [music] tiny grooves on the
61. 2:51surface similar to those on a CD. When
62. 2:55light hits these grooves, it splits into
63. 2:57different colors and creates a rainbow
64. 2:59pattern.
65. 3:06>> Okay, so let's get into when beef shows
66. 3:11rainbow colors. M.
67. 3:14Now, have you ever ordered a bowl of
68. 3:17beef noodles and seen strange green or
69. 3:20rainbow colors on the meat? Again, me
70. 3:24personally to answer if you're asking if
71. 3:26I was asking myself, no, absolutely not.
72. 3:30>> I don't order this, but I my wife has
73. 3:32ordered it and I never have asked her.
74. 3:36Um, but I absolutely intend to go home
75. 3:39and ask my wife, is this a phenomenon
76. 3:42that is actually happening with your uh
77. 3:46with your beef noodles?
78. 3:49>> Yeah, we've got to know.
79. 3:51>> Well, it says here, don't worry, it's
80. 3:54not spoiled. This colorful display is
81. 3:57completely normal and the meat is safe
82. 4:01to eat.
83. 4:02>> Oh, would you look at that? Safe to eat.
84. 4:05I would not expect it to be safe to eat.
85. 4:08I just think if my meat were weird
86. 4:11colors, like rainbowy colors, I would
87. 4:14>> push that aside. And that's probably
88. 4:17like why I'm a vegetarian in the first
89. 4:19place.
90. 4:19>> It could be.
91. 4:20>> I probably saw like some like weird
92. 4:22colored meat and I was like, that's just
93. 4:24weird. I'm gonna just eat carrots.
94. 4:25Thanks.
95. 4:26>> Uh, so what's normal mean? U Okay. Well,
96. 4:30normal just means healthy or okay.
97. 4:33Because here we're talking about it's
98. 4:35normal and it's safe to eat. Uh it's
99. 4:37normal or okay. It's just the way it
100. 4:39should be. So for example, Natalie's
101. 4:43blood test results showed everything was
102. 4:46normal. So it was okay. It was good to
103. 4:49go.
104. 4:50>> Yeah.
105. 4:50>> And healthy. No problems. All right. Why
106. 4:53don't we go ahead and cut to Hy. You
107. 4:56tell us some stuff. Hy.
108. 5:19normal. Normal.
109. 5:25Weird.
110. 5:28We ei d weird.
111. 5:34>> All right. Thank you so much, Hy. Now,
112. 5:36we're going to continue on with our
113. 5:39article. So, what causes these unusual
114. 5:43colors?
115. 5:44>> Aliens.
116. 5:45>> Oh, no. Don't go. Let's Oh, god. I hope
117. 5:48not. Let's keep reading to find out.
118. 5:50Fingers crossed that that's not what it
119. 5:52is.
120. 5:52>> Not aliens. [laughter] Hopefully.
121. 5:54Fingers crossed.
122. 5:55>> Let's hope not. Now the rainbow effect
123. 5:58happens because of something called
124. 6:00light defraction.
125. 6:02>> Okay. So light defraction is like when
126. 6:05light hits an object and then the light
127. 6:10uh goes in different directions and
128. 6:13could make things change colors and
129. 6:15stuff like that.
130. 6:16>> Yeah.
131. 6:16>> Like if you like put light shine light
132. 6:18into a crystal,
133. 6:20>> it defracts. It goes like you know in
134. 6:22different colors. Yeah,
135. 6:23>> that's why diamonds shine
136. 6:25>> like that. We call that like light
137. 6:27defraction.
138. 6:27>> Great.
139. 6:28>> So, not aliens. Good.
140. 6:30>> Okay. Not aliens. Okay. So, when meat is
141. 6:34sliced with a sharp knife,
142. 6:36>> the cut creates tiny grooves on the
143. 6:39surface similar to those on a CD.
144. 6:43>> Oh, okay.
145. 6:45>> That's some pretty sharp cutting skills.
146. 6:47Maybe it has to do with like actually
147. 6:50how sharp and like how ex smooth this
148. 6:55meat has been cut.
149. 6:56>> Yeah,
150. 6:57>> maybe it's something to do with that
151. 6:58because I think a CD is being like
152. 7:01extremely smooth.
153. 7:02>> Yeah. Now, for those who might not know,
154. 7:04CD, if you don't know, CD is what um
155. 7:08some of us older people, that's how we
156. 7:10used to listen to music. If you don't
157. 7:12know, ask your parents. They can show
158. 7:13you what a CD is. Some of you might not
159. 7:15know. compact disc.
160. 7:17>> Tomat disc. We're learning all types of
161. 7:19things today. All right.
162. 7:20>> They are. Okay.
163. 7:22>> And to continue on with our article. So,
164. 7:24when light hits these grooves, it splits
165. 7:27into different colors and creates a
166. 7:29rainbow pattern. Now, split is a verb.
167. 7:34Split kind of just means to uh divide or
168. 7:37cut into different pieces. Um, and how
169. 7:41we would use that in a sentence would be
170. 7:42to say the class split into two teams
171. 7:46for the debate. So maybe they had one
172. 7:49group and then they split in half into
173. 7:52team one and team two.
174. 7:54>> Oh, okay. All right. Why don't we go
175. 7:56ahead and go to
176. 8:06alien? A L I E N
177. 8:15light defraction.
178. 8:33How can split split?
179. 8:47compact disc.
180. 8:52Because of because
181. 8:55of because
182. 9:01of
183. 9:05because
184. 9:10the parade was cancelled because of bad
185. 9:13weather.
186. 9:19Because
187. 9:21The parade was cancelled because the
188. 9:24weather was bad.
189. 9:50The boy is holding a jar which is filled
190. 9:53with marbles
191. 9:59which is filled with marbles
192. 10:03which is filled filled
193. 10:06The boy is holding a jar filled with
194. 10:09marbles.
195. 10:11A jar
196. 10:14filled.
197. 10:18I'm still not entirely
198. 10:22convinced about this. Luckily, I don't
199. 10:25really have to worry about this
200. 10:26phenomenon. That's true.
201. 10:28>> And it's not going to really affect my
202. 10:29life being somebody who doesn't really
203. 10:32eat meat. But I'm wondering if next time
204. 10:35you go to the beef noodle shop if you're
205. 10:37really going to be looking at it. And I
206. 10:39wonder if it's going to affect you. Like
207. 10:41maybe
208. 10:42>> I mean it will. I'm still very curious.
209. 10:44I really want to see this uh this
210. 10:47magical meat.
211. 10:48>> I feel like I would be more hesitant
212. 10:50now, not less hesitant. I feel like as
213. 10:52soon as I saw the colors, I'd be like,
214. 10:53"Ah,
215. 10:54>> I know. I know." But you know what? Now,
216. 10:56at least now if with the next time that
217. 10:58I do go into a beef noodle shop or I do
218. 11:01get something to eat, if I do see a
219. 11:03little bit of color in there, I know
220. 11:05that it's safe to eat.
221. 11:06>> Okay, why don't we go to the second part
222. 11:08of the article and we'll be right back.
223. 11:16>> [music]
224. 11:17>> Additionally, dark meats like beef show
225. 11:20rainbows better than light meats like
226. 11:22chicken because the dark background
227. 11:24makes the colors easier to see. Rainbow
228. 11:28colors on meat are completely safe and
229. 11:30don't affect the taste. While these
230. 11:32rainbow colored hues are harmless, there
231. 11:34are other real signs that meat has gone
232. 11:36bad, such as if it smells bad or feels
233. 11:39sticky. So, next time you see colorful
234. 11:42meat, remember it's likely just science
235. 11:45creating a beautiful light show on your
236. 11:46food.
237. 11:54Okay, welcome back everybody. So, let's
238. 11:57get back into the article of colorful
239. 12:00beef. Additionally, dark meats like beef
240. 12:04show rainbows better than light meats
241. 12:06like chicken because the dark background
242. 12:09makes the colors easier to see.
243. 12:13>> Oh, that makes sense. That explains why
244. 12:16I haven't seen this before. I'm more of
245. 12:18like a chicken person.
246. 12:20>> More chicken pork.
247. 12:21>> Yeah, more chicken pork and less kind of
248. 12:24beefy darker meat. So maybe that's why.
249. 12:26>> Okay. Well, here it says additionally.
250. 12:30And additionally is an adverb which just
251. 12:32means also or another thing. So for
252. 12:37example, we had to arrive quite early
253. 12:41additionally or like also we had to fill
254. 12:44out more forms.
255. 12:47>> Okay.
256. 12:48>> Yeah. And we also have uh another
257. 12:51vocabulary word here which is the word
258. 12:52background. Now, background is a noun,
259. 12:56and background is kind of like something
260. 13:00that would be behind you. You could kind
261. 13:03of say, right? Like something
262. 13:05>> in front of you is here. And then the
263. 13:07background would be what's behind us.
264. 13:09>> Like what's in front of you would be
265. 13:10like the foreground.
266. 13:11>> Foreground, right? Foreground. And then
267. 13:13background is kind of what's back there.
268. 13:16Forward.
269. 13:16>> Forward. Backward. Exactly. Yeah.
270. 13:19>> So, for example, we could say the
271. 13:21mountains in the background made the
272. 13:23photo more beautiful.
273. 13:25>> Perfect example.
274. 13:26>> Sure. Yeah.
275. 13:29>> Now, rainbow colors on meat are
276. 13:32completely safe and don't affect the
277. 13:35taste, which I mean, thank God for that.
278. 13:38Uh, like I said, even though I'm more of
279. 13:40a chicken pork person, I do occasionally
280. 13:43indulge in some hot pot and beef noodle
281. 13:45soup. So very very glad to hear that the
282. 13:48meat that I'm eating is safe even if it
283. 13:50does, you know, kind of look like some
284. 13:53Dr. Seuss green eggs and ham thing going
285. 13:55on a little bit. [laughter]
286. 13:58>> Okay. All right. Why don't we go to
287. 14:00Hammy and see what she thinks about
288. 14:01that?
289. 14:14Fore
290. 14:31indulge. I N D U L G E. Indulge.
291. 14:39Additionally,
292. 14:43background
293. 14:48foreground.
294. 14:53Make
295. 15:10The comment made her angry.
296. 15:15The song made him a household name.
297. 15:23>> Well, thank you, Hannie. Uh, let's get
298. 15:26back into the article. While these
299. 15:29rainbow colored hues are harmless, there
300. 15:33are other real signs that meat has gone
301. 15:36bad,
302. 15:37>> such as if it smells bad or feels
303. 15:42sticky.
304. 15:44>> Okay, I do know that.
305. 15:46>> That's that is a telltale
306. 15:49telltale sign.
307. 15:50>> There you go.
308. 15:51>> That Thank you. [laughter]
309. 15:53some things that meat has gone bad or
310. 15:56even stuff like because I eat tofu a lot
311. 15:58and I'll notice like all of a sudden my
312. 16:00tofu has been sitting in the
313. 16:02refrigerator and it gets sticky and then
314. 16:03I'm like, "Oh, okay. That's not good."
315. 16:06>> That's how you know it's no good.
316. 16:07>> I I don't want that. I want it to be
317. 16:09nice and smooth. Okay. Um so harmless is
318. 16:12a vocabulary word we have here, which
319. 16:15just means not able to hurt you
320. 16:19>> or you could say safe. Yeah.
321. 16:22>> So, for example, the spider looked
322. 16:25scary, but it was completely harmless.
323. 16:29>> Yeah, sure it was.
324. 16:31>> Are you Are you afraid of spiders? Oh,
325. 16:34>> kind of. You're not?
326. 16:35>> You know, I think I just wanted to eat
327. 16:37them. So, I'm I'm I think I'm I'm I'm
328. 16:40okay on that front.
329. 16:41>> It's like a really big spider. I don't
330. 16:43think you're going to want to
331. 16:44>> do that to it. [laughter] It'll attack
332. 16:47you.
333. 16:47>> Now, continuing on with the article. So,
334. 16:51next time you see colorful meat,
335. 16:53remember it's likely just science
336. 16:55creating a beautiful light show on your
337. 16:59food, which makes me feel so much
338. 17:01better. And what a lovely way to think
339. 17:03about it, right? A light show on your
340. 17:05food. That's so fun.
341. 17:06>> That's Yeah, if you're going to have to
342. 17:08like really like embrace
343. 17:11>> the rainbow,
344. 17:13>> then let's think about it like in terms
345. 17:15of science and this is just a beautiful
346. 17:17light show. I I do kind of think I I
347. 17:20like that.
348. 17:20>> I love that. All right, why don't we go
349. 17:22to Hannie and then we'll go to our what
350. 17:26do you think question. All right, let's
351. 17:27Hie.
352. 17:42Telltale signale
353. 17:51harmless
354. 17:56ls.
355. 18:03Thank you, Hanny. Okay, we have our what
356. 18:06do you think question. Can you think of
357. 18:10other examples of foods that look
358. 18:13strange but are still safe to eat?
359. 18:16>> You know what? The very first thing that
360. 18:18comes to mind is blue cheese.
361. 18:21>> Oh, blue cheese.
362. 18:22>> Blue cheese. It's very crumbly and kind
363. 18:24of off-white, but it's called blue
364. 18:26cheese cuz it has these little pieces of
365. 18:29bluish green teal colored mold in it.
366. 18:32>> It's mold.
367. 18:33>> It's mold.
368. 18:33>> It actually is mold.
369. 18:35>> It is mold
370. 18:36>> that you're eating. So, not only is it
371. 18:38just like this thing about the color or
372. 18:41whatever, but you know,
373. 18:43>> yes,
374. 18:43>> you're eating mold, but
375. 18:46>> still safe to eat.
376. 18:47>> Safe.
377. 18:47>> It's perfectly safe, perfectly normal.
378. 18:49People put it on salads and in pastas
379. 18:51and all types of stuff all the time.
380. 18:53>> Yeah, it really does look strange, but
381. 18:54it is so delicious.
382. 18:56>> It is.
383. 18:56>> I really like that.
384. 18:58>> It is wonderful.
385. 18:59>> Okay, so now we know.
386. 19:00>> Yay! Blue cheese.
387. 19:01>> Mhm. Okay. Well, why don't we go ahead
388. 19:03review the article again and we will see
389. 19:06you next time. All right. Have a great
390. 19:09day. Bye bye.
391. 19:13[music]
392. 19:17Have you ever ordered a bowl of beef
393. 19:20noodles and seen strange green or
394. 19:22rainbow colors on the meat? Don't worry,
395. 19:25it's not spoiled. This colorful display
396. 19:28is completely normal and the meat is
397. 19:30safe to eat.
398. 19:32So, what causes these unusual colors?
399. 19:35The rainbow effect happens because of
400. 19:37something called light [music]
401. 19:38defraction. When meat is sliced with a
402. 19:41sharp knife, the cut creates tiny
403. 19:43grooves on the surface, similar to those
404. 19:45on a CD. When light hits these grooves,
405. 19:49it splits into different colors and
406. 19:50creates a rainbow pattern. Additionally,
407. 19:54dark meats like beef show rainbows
408. 19:56better than light meats like chicken
409. 19:58because the dark background makes the
410. 20:00colors easier to see. Rainbow colors on
411. 20:04meat are completely safe and don't
412. 20:05affect the taste. While these rainbow
413. 20:08colored hues are harmless, there are
414. 20:10other real signs that meat has gone bad,
415. 20:12such as if it smells bad or feels
416. 20:15sticky. So, next time you see colorful
417. 20:18meat, remember it's likely just science
418. 20:20creating a beautiful light show on your
419. 20:22food.
420. 20:34Normal
421. 20:36split.
422. 20:40Additionally,
423. 20:44background
424. 20:46harmless.
425. 20:53Because of him. Because
426. 21:04Fore
427. 21:15speech.
428. 21:24Anything
429. 21:40that is artificial is made by humans and
430. 21:45does not occur naturally. [music] And at
431. 21:47today's location, there is an artificial
432. 21:51lake. Even [music] though it's not made
433. 21:53by Mother Nature herself, it's still a
434. 21:57beautiful site to see. [music] Let's
435. 21:59visit the Maple Garden.
436. 22:02The Maple Garden attracts [music] both
437. 22:04local residents and visitors. It has an
438. 22:08artificial lake, grass-covered slopes,
439. 22:10and a bridge. The park is good for the
440. 22:14city's environment. It also helps stop
441. 22:16the city from flooding. When you stand
442. 22:19on the glass observatory deck [music]
443. 22:21and look down, the lake looks like a
444. 22:24beautiful painting. When it gets dark,
445. 22:27the lights reflect on the [music] lake.
446. 22:30You can enjoy the nice view and peace.
447. 22:33And on [music] the weekends, there are
448. 22:35street artists playing music. The Maple
449. 22:38Garden is a [music] great place to
450. 22:40relax.
451. 22:43So, if you're looking to have a nice and
452. 22:45relaxing time to yourself or with your
453. 22:48family and friends, the Maple Garden is
454. 22:51the ideal place [music] to spend your
455. 22:54day.