尽管我们感觉不到，但空气就存在于我们身边。

Air is present around us though we cannot feel it.

youdao

人可以从空气的气味中发现好与坏，但空气本身却不受好与坏的影响。

One finds good and bad smells in the air, but the air itself is untainted.

youdao

但空气在接近裂缝的时候速度会越来越快，杰弗里·兰迪斯说，他是美国宇航局在克利夫兰·格伦研究中心的一位物理学家。

But air picks up speed as it approaches a fissure, said Geoffrey Landis, a physicist at NASA's Glenn Research Center in Cleveland.

youdao