It happens at the very beginning of the book.

这事发生在书的一开头。

《牛津词典》

It is also important to look at the wider picture of what happens when so many people live for 100 years.

同样重要的是，当这么多人活到100岁时会发生什么。

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But it is also important to look at the wider picture of what happens when so many people live for 100 years.

但从更广泛的角度来看，当这么多人活到100岁时，会发生什么也很重要。

youdao

Psychologist Jonathan Rottenberg at the University of South Florida says they wanted to study crying as it happens in everyday life, not in a laboratory.

VOA: special.2009.01.28

This is a very-- it's fascinating that it happens at all, that you have severe damage but compensated with some powerful skill.

这种现象总会发生,个体出现严重损伤,但某些技能却会变得强大以作为补偿

耶鲁公开课 - 心理学导论课程节选

But now, what happens if, instead we look at what happens when we go to some state one to some other state two and it's the pressure. Or the volume, that changes.

但是现在，我们看看如果,我们关系从状态一变化到状态二时,体积或者压强发生变化。

麻省理工公开课 - 热力学与动力学课程节选

The frequency at which it happens is related to a small but significant difference between the mass of the particle and its antiparticle.

ECONOMIST: Cosmology and particle physics

Nothing happens right up until the moment when it all happens at once.

FORBES: Reinhart and Rogoff; and The Dangers of Tipping Points, Real and Otherwise

"Because it was disclosed and there was no long-term security matter here, it gives the Secret Service the opportunity to clear up what has happened, do all it can to make sure it never happens again or at least minimizes it to make it very, very difficult for it to ever happen again, " he said.

CNN: STORY HIGHLIGHTS