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B1 中级 英语 9:17 1,529 单词 Science & Tech

What Dinosaurs, Pyramids, and the Atomic Bomb Have in Common

SciShow · 120,178 次观看 · 添加于 2 个月前

AI摘要

这个引人入胜的科学视频讲述了物理学家路易斯·阿尔瓦雷斯的故事——他参与了曼哈顿计划,用缪子扫描埃及金字塔,还帮助证明了小行星导致恐龙灭绝。学习者将接触到丰富的学术词汇,包括'nuclear chain reaction(核链式反应)'、'implosion(内爆)'、'muons(缪子)'、'iridium(铱)'和'mass extinction(大灭绝)'。非常适合在科学史和跨学科主题中提升英语能力。

学习统计

B1

CEFR 等级

1,529

总词数

674

独特词汇

5/10

难度

词汇多样性 44%

字幕 (87 片段)

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00:00

Sometimes, being an expert in one scientific field does not translate to another.

00:05

The ability to design a nuclear  reactor doesn’t make you qualified to dish out health advice… unless that  advice is to avoid eating uranium.

00:12

But if you’re particularly  clever, you might find yourself making headlines for discoveries  in multiple scientific fields.

00:19

And today, we’re going to  talk about one such scientist: a particle physicist named Luis Alvarez, who investigated everything from atomic bombs, to Egyptian pyramids, to what  actually killed the dinosaurs.

00:31

[♪INTRO]

00:34

Luis Alvarez was born in  1911, which put him in a great position to contribute to the  newfangled field of particle physics.

00:41

For example, that was the same  year that Ernest Rutherford proposed an updated concept of an atom, where most of its mass is concentrated  in a small, compact nucleus.

00:50

But it was also two decades  before we knew that nuclei didn’t just have protons  in them, but neutrons, too.

00:56

Alvarez got a PhD in physics  from the University of Chicago before heading to UC Berkeley’s  Radiation Laboratory.

01:03

And like any good scientist, he was constantly trying out new things and experimenting.

01:08

So it’s no surprise that he was soon pulled into one of the biggest science experiments in history.

01:13

Life comes at you fast, and so did World War II.

01:17

Alvarez started off working  in the microwave radar space.

01:20

But eventually, he wound  up at the hottest place for scientists in the early  1940s: Los Alamos, New Mexico.

01:28

Working on …you guessed it… The Manhattan Project.

01:30

You probably remember from history class… or the movie Oppenheimer… that the U.S. dropped two nuclear bombs on Japan.

01:37

But you might not remember that they were fundamentally different pieces of tech.

01:41

Little Boy was a gun-type bomb  powered by the element uranium.

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核心词汇 (13)

you A1 pronoun

你是一个好人。(You are a good person.)

nuclear A2 verb

核心家庭是指由父母和子女组成的家庭单位。

work A1 verb

指进行体力或脑力活动以完成任务、生产商品或提供服务。

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