smoke level的意思|示意

No matter what level of exposure of smoke you have, your lung cells know it and they are responding.

无论你暴露在何种程度的烟雾环境中，你的肺部细胞都知道并且会做出反应。

If there's smoke in the cabin, get low and crawl below the level of the smoke and toxic fumes, so you can breathe until you get out of the plane.

如果机舱里有烟雾，把身体放低到烟雾与有毒气体的下面爬行，这样你能在你离开飞机前保持呼吸。

There is no safe level of exposure to second-hand tobacco smoke.

关于二手烟草烟雾，不存在安全接触水平。