小船舱里的空气变得烟雾弥漫。

The ___atmosphere in the small cabin grew thick with smoke.

讲堂里的空气沉闷而温热。

The ___atmosphere in the lecture hall was stale and warm.

拥挤的地铁车厢里，空气污浊难闻。

The ___atmosphere on the crowded subway car was heavy and unpleasant.