当我们吸气的时候，这些肌肉就收缩，扩大肺部并吸入空气。

These muscles contract when we breathe in, expanding the lungs and drawing in air.

youdao

l 站立，呼气，然后测量——不能在吸气的时候测量

Stand up. Exhale before you measure -- donot suck in your breath.

youdao

观众中传出了因恐怖而倒吸气的声音， 然后便是焦急的不停的窃笑。

There was an indrawn breath of horror from the audience and then the anxious and everlasting titter .

youdao

But there are all sorts of things, you can just breathe in and breathe out, and it's a real opportunity.

但也有很多种事情，你只需吸气呼气，实为难得的机会。

普林斯顿公开课 - 人性课程节选

Most of us don't breathe deeply enough.

多数人吸气的深度不够。

哈佛公开课 - 幸福课课程节选