This acid air has been known to denude forests, and obviously the inhalation of such air cannot be good for human lungs.

这种酸性气体，我们都知道毁坏森林。显然，吸入这样的空气对人的肺不利。

youdao

For instance, yawning should not occur when ambient temperatures exceed body temperature, as taking a deep inhalation of warm air would be counterproductive.

举个例子，呵欠在环境温度超过体温时不大可能发生，因为这时候深吸一口热空气只能帮倒忙。

youdao

Conclusion: Prophylactic inhalation of negative air ions can increase the cochlear blood flow and promote microcirculation thus protecting the cochlea from acoustic trauma.

结论：预防性吸入空气负离子可增加耳蜗血流量，改善微循环，因而对保护噪声性耳蜗损伤是有益的。

youdao