contagious相关的词根或词缀是: tacttagtigting

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The strain proved contagious but only mildly virulent .

证明了该菌株会蔓延的，但只有轻微的毒性。

A yawn is more contagious than any of these .

打哈欠比任何这些状况都更易传染。

Apparently the child 's disease is contagious , herpes virus !

显然孩子的病是被人传染的，属于疱疹病毒！

Attitudes are contagious . Are yours worth catching ?

态度可以传染，你的态度值得感染他人吗？

Contagious yawning is a different story .

而传染性哈欠就大不相同了。