流行病

yù fáng liú xíng bìng

预防流行病

prevent an epidemic disease

diào chá méi néng zhǎo chū liú xíng bìng de bìng yīn

调查没能找出流行病的病因。

An investigation has failed to discover the cause of the epidemic.

bǎ yā lì bǐ yù chéng yī zhǒng liú xíng bìng zhè ge shuō fa yī diǎn yě bù kuā zhāng

把压力比喻成一种流行病这个说法一点也不夸张。

To call stress an epidemic isn't exaggeration.