The oldest form of empathy is contagious fear.

同理心最古老的一种形式 就是具有传染力的恐惧。

They're having fun, and as the audiences' exuberant reactions indicate, the fun is contagious.

他们很开心，正如观众们热情洋溢的反应表明的那样，快乐是会传染的。

Their enthusiasm is contagious, no question about it.

他们的热情十分具有感染力，这一点是毫无疑问的。

First of all, smiling is contagious.

首先，微笑是会传染的。

Blame also seems to be contagious.

指责似乎也有传染性。

Among turtles, the tumors are contagious.

这种肿瘤在海龟中是会传染的。

She could be contagious. Dr. Pratt.

她很有可能被传染了 我是Pratt医生。

Kerstin Forsberg, your -- your smile, your passion are contagious.

Kerstin Forsberg，你的笑容，你的热情都很有感染力。

It was found that thinking patterns can be contagious.

研究发现思维方式可以传染。

While yawning is contagious, not everyone catches a yawn.

虽然打哈欠会传染，但不是每个人都会打哈欠。

There is an old saying in English, laughter is contagious.

英语中有句老话，笑声具有传染力。

It's not known when exactly people are contagious once they've contracted it.

我们也不知道人们感染病毒后何时会具有传染性。

And scientists think you could be contagious during most of this period.

而科学家们认为你在大部分的潜伏期内 是具有传染能力的。

A study found that negative thinking can be contagious in some cases.

有研究发现消极思维在很多情况下会传染。

So, it's only when they are feverish that they are contagious.

所以, 只有出现发烧症状, 病人才具有传染性。

That are moving that actually make you feel better. So smiles are contagious.

会收缩 让你感觉更好 笑是传染的。

Panic is contagious and prompts a fight or flight survival system to kick in.

恐慌具有传染性，并刺激人类开启战斗或逃跑生存系统。

I think you have chicken pox! You are contagious! Get away! Don't breathe on me!

我觉得你可能长水痘了！会传染的！快走开！不要对着我呼吸！

They are contagious – they can spread from one person to another.

它们会传染，可以从一个人传染给另一个人。

It also means, however, that it is impossible to know who may be contagious.

然而，这也意味着，无法知道谁可能具有传染性。