spread from mouth to mouth

Sometimes a nail-biter's hands and fingers can become infected, but more often, the habit leads to an increased risk of contracting colds and other illnesses because it encourages the spread of germs from the nails to the lips and mouth.

在有些时候，有咬甲癖的人的手和手指会感染，但这种习惯在更多情况下会增加人们患上感冒和其他疾病的风险，因为这增大了细菌从指甲中传染到嘴唇和嘴里的几率。

The news spread rapidly from mouth to mouth.

一传十,十传百,这消息很快就传开了.

The news spread from mouth to mouth.

这消息广为流传.

The news spread quickly from mouth to mouth throughout the school.

这个消息很快在学校传开了.

The rumours spread like wildfire from mouth to mouth in that town.

谣言在那个小城镇像野火般地传开了.