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B1 中级 英语 6:26 1,199 单词 Science & Tech

Tylenol Is Made From Crude Oil. Can We Change That?

SciShow · 47,495 次观看 · 添加于 2 个月前

AI摘要

这期SciShow视频解释了泰诺(对乙酰氨基酚)传统上如何从原油中制造,并探索了利用细菌将塑料废弃物转化为这种常用止痛药的前沿研究。学习者将接触到化学和生物学词汇,如'聚合物'、'单体'、'生物升级回收'和'生物相容性'等。该视频非常适合练习科学解释技能和理解环保创新。

学习统计

B1

CEFR 等级

1,199

总词数

494

独特词汇

4/10

难度

词汇多样性 41%

字幕 (78 片段)

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00:00

A lot more depends on fossil  fuels than you might expect.

00:03

Like your medicine cabinet. No, not the plastic pill bottles… the pills  themselves might be derived from crude oil.

00:08

Indeed, one of our most commonly-used drugs uses  a component of crude oil as a starting material.

00:13

And that drug is: Tylenol! Which is, by the way, safe and  effective, including during pregnancy.

00:19

Hence why it’s commonly-used. More than 15,000 metric tons are  produced globally every year.

00:24

Which means a lot of petroleum goes into  that needed, safe and effective pain relief.

00:29

Unless we didn’t have to use oil.. It is possible to recycle  plastic and turn it into Tylenol.

00:34

Not possible for us humans, though – we  need a hand from a pretty unexpected place.

00:39

[♪ INTRO]

00:42

Crude oil contains the starting chemicals  needed for a bunch of things you might not   think of, from shaving cream to paintbrushes,  clothing to fertilizers… and acetaminophen.

00:51

AKA Tylenol. Also called paracetamol outside the US.

00:55

We’ll just stick to calling  it Tylenol for this video,   though keep in mind we mean  the substance, not the brand..

00:59

See, Tylenol is made up of carbon,  nitrogen, oxygen and hydrogen.

01:03

But the thing about chemical synthesis  is that you can’t just pick out the   elements you want and stick them  together like building bricks.

01:09

There are only certain chemical  reactions that are physically possible.

01:12

To build up a molecule with an  oxygen here and a nitrogen there,   you need the right conditions  to achieve those reactions.

完整字幕可在视频播放器中查看

核心词汇 (15)

you A1 pronoun

你是一个好人。(You are a good person.)

break A1 verb

将某物打碎成碎片。机器停止运转。

possible A2 adjective

可以发生或可以做到的事情。“赢是可能的。”

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