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

他们很开，正如观众们热情洋溢反应表明那样，快乐传染。

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！传染！快走开！不要对着我呼吸！

Yawning is actually a difficult case when it comes to these contagious behaviours.

就这些传染行为而言，打哈欠实际上一个复杂例子。

This is another term for measles, a contagious virus that's characterized by a skin rash.

Measles麻疹另一种说法，这一种皮疹传染性病毒。

There's also some cool studies that show that loneliness is actually contagious.

还有一些很研究表明，孤独传染。

My greatest fear is that I am going to give it to my parents.

我最担，我可能传染给我父母。

And then this typical rash develops, which is sort of pustular in form, and that's usually what's infectious, and this is infectious until the scabs actually fall off.

然后就出现典型皮疹，就像脓疱一样，这通常传染，在结痂脱落之前都有传染性。

And much like yawning, being itchy is thought to be contagious, as some of you may be noticing right about now.

就像打哈欠一样，痒被认为传染，你们中一些人现在可能已经注意到了。

Like mental states, ideas are contagious; much more so when we expose ourselves to people that share the same worldview.

就像精神状态一样，想法传染；当我们接触拥有相同世界观人时，情况就更如此。

You have to take extra precaution now, because this is, I can take this home to my family.

必须要做好防范，因为传染给我家人。

First of all, smiling is contagious.

首先，微笑传染。

Among turtles, the tumors are contagious.

这种肿瘤在海龟中传染。

I will hear not those who weep and complain, for their disease is contagious.

我不听到那些哭泣和抱怨人，因为他们疾病传染。

Maybe you've heard that depression is contagious, and you're afraid of catching it.

也许你听说过抑郁症传染，你很害怕感染它。

And wanting to do the right thing is also contagious.

而且想要做正确事情也传染。

It turns out that math anxiety is contagious.

事实证明， 数学焦虑传染。

That there's like contagion via proximate coworkers.

据说通过附近同事产生类似传染效果。

Yeah, I mean, we know for sure that emotions are contagious, right?

， 我们都知道情感传染， 对吧？

Because it's contagious when you live in a very entrepreneurial city.

因为在你生活在一座非常具有创业精神城市时，这种氛围传染。

But I say this also, my dear friends, courage is also contagious.

但我要告诉你们，亲爱朋友们，勇气也传染。