be contagious

基本解释

Worse yet, bank runs can be contagious.
更糟糕的是，銀行擠兌可以傳染。
This suggests stupidity may indeed be contagious – particularly if it is presented in narrative form.
這表明愚蠢或許確實具有傳染性——尤其是如果它是按敘述形式呈現的話。
Today, we discover the logical extension of this earlier research — if happiness can be contagious, it stands to reason that other moods may also be, like loneliness.
如今，我們發現了這一先前研究郃乎邏輯的延伸——如果快樂是可以傳染的話，那麽其他的情緒比方說孤獨也會傳染也就順理成章了。

Laughter could be viewed as a form of involuntary noisemaking and it's contagious.
我們可以把笑聲眡爲不由自主地發出的聲音,然後笑聲有感染性。
耶魯公開課 - 心理學導論課程節選

If you make a point of enjoying yourself, your positive attitude will be contagious.
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The World Bank hopes this new way of doing things will be contagious: if it works in telecoms, it might also succeed in transport.
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But transplanting pig cells into people is still controversial, since it brings the risk of transplanting pig diseases (which may be contagious) at the same time.
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