它们藏在鼻腔与肺脏的内衬里，惟恐我们会在拥挤的地下铁吸入流感病毒。

In the lining of our nose and lungs, lest we inhale the influenza virus in a crowded subway car.

youdao

它们藏在鼻腔与肺脏的内衬里，惟恐我们会在拥挤的地下铁吸入流感病毒。

In the lining of our nose and lungs, lest we inhale the influenza virus in a crowded subway car.

youdao