跟读练习: Bill Gates - Population - Vaccines - 通过视频学习英语口语

This equation has four factors, a little bit of multiplication.

So you've got a thing on the left, CO2, that you want to get to zero.

And that's going to be based on the number of people, the services each person's using on average, the energy on average for each service,

and the CO2 being put out per unit of energy.

So let's look at each one of these and see how we can get this down to zero.

Probably one of these numbers is going to have to get pretty near to zero.

That's back from high school algebra.

But let's take a look.

First, we've got population.

The world today has 6.8 billion people.

That's headed up to about 9 billion.

Now, if we do a really great job on new vaccines, healthcare, reproductive health services, we could lower that by perhaps 10 or 15%.

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75 句

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23 句

Vocabulary and speaking notes for this lesson

This B2 speaking lesson is built on the video “Bill Gates - Population - Vaccines”. This video has 12 sentences and 143 words to shadow. The speech runs for 0:52. The speaker talks at a natural 163 words per minute, close to everyday conversation.

Key vocabulary in this video

The 8 most advanced words in the video, with pronunciation and meaning:

Word	Pronunciation	Meaning
equation noun	/ɪˈkweɪ.ʒən/	The act or process of equating two or more things, or the state of those things being equal (that is, identical).
vaccine noun	/vækˈsin/	A substance given to stimulate a body's production of antibodies and provide immunity against a disease without causing the disease itself in the treatment…
reproductive adjective	/ˌɹiːpɹəˈdʌktɪv/	Of or relating to reproduction.
algebra noun	/ˈæl.d͡ʒɪ.bɹə/	Elementary algebra: A system for representing and manipulating unknown quantities (variables) in equations.
multiplication noun	/ˌmʌltɪplɪˈkeɪʃən/	The process of computing the sum of an addition with one and the same number a specified number of times (i.e. 4 times 5 = [0 +] 5 + 5 + 5 + 5 = 20) or any…
zero noun	/ˈzɪɹoʊ/	The numeric symbol that represents the cardinal number zero.
factor noun	/ˈfæk.tɚ/	An agent or representative; a reseller or distributor (sometimes with a private label); a consignee.
unit noun	/ˈjuː.nɪt/	Oneness, singularity, seen as a component of a whole number; a magnitude of one.

Phrasal verbs you will hear

Word	Meaning
put out verb	To blind (eyes).

视频中的语法

说话人最常用的结构，并附上视频中的原话：

结构	视频中的用法
被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的	be based · being put

Pronunciation to watch

The “sh” and “zh” sounds: equation /ɪˈkweɪ.ʒən/, multiplication /ˌmʌltɪplɪˈkeɪʃən/
Long words — get the stress right: reproductive /ˌɹiːpɹəˈdʌktɪv/, multiplication /ˌmʌltɪplɪˈkeɪʃən/

How to practise with this video

Listen to the whole video once without speaking and note the words you do not know.
Start at 0.75× speed, shadow it sentence by sentence, then go back to normal speed once it feels easy.
Record yourself and compare with the original, paying attention to words like equation, vaccine, reproductive.

什么是跟读法？

跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。

影子跟读法: 阅读完整分步指南 →

跟读练习: Bill Gates - Population - Vaccines - 通过视频学习英语口语

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