Humans take in oxygen and breathe out carbon dioxide.

人吸入氧气，呼出二氧化碳。

《牛津词典》

Ensure you breathe in on the way down, and breathe out as you push up.

确保你在下卧的时候吸气，在推起的时候吐气。

youdao

Always breathe in through your nose and breathe out through your mouth.

一直通过鼻子吸气、通过嘴巴呼气。

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

You breathe in, and breathe out.

吸气，呼气。

普林斯顿公开课 - 人性课程节选

You shouldn't be able to hear very much either, and it mustn't have been too delightful to breathe out of the thing, although your nose is free, but it's covered by a nose piece.

而且也听不见什么了,同时,戴着头盔呼吸也不是很顺畅,虽然鼻子并不受束缚,但是上面有一块小薄片覆盖着

耶鲁公开课 - 古希腊历史简介课程节选

Example: In one of the most brazen chemophobic claims in the history of science and government, politicians around the world are now condemning carbon dioxide (the air that we breathe out and plants imbibe) as a dangerous pollutant.

FORBES: Magazine Article

Breathe out and repeat with the other nostril, experts say.

CNN: Why people swear by the neti pot

The few occasions I saw her pause she would put a hand over her eyes, breathe in and out deeply, and that was when I would know she was exhausted.

NEWYORKER: The Pura Principle