Conversely, some studies have shown that hand dryers may actually emit bacteria in their flow because of the contaminated air from the bathroom.

相反的，有些研究显示，因为厕所受污染的空气，烘手机吹出来的风其实是有细菌的。

The contaminated air would make your eyes red and itchy.

被污染的空气会使你的眼睛发红发痒。

They thought this would avoid allowing the disease to contaminate the air.

他们认为这样可以防止病毒污染空气。