It's illegal, so they can't sign that as a contract, but they they can just agree to do it.

因为是违法的,合同也就无效了,不过他们可以私下达成默契

耶鲁公开课 - 博弈论课程节选

Do you think that downloading should be absolutely illegal and prohibited?

你觉得下载是绝对违法的，应该禁止吗？

不能非法下载 - SpeakingMax英语口语达人

So even without there being an Attorney General, somebody might be awake in the justice department and notice that that's actually illegal.

就算是司法部长不知情,司法部门也会有人会发现,这样的协议是违法的

耶鲁公开课 - 博弈论课程节选

It was illegal--it's still illegal in France to name a baby a name that is not officially approved, absolutely--or even to adopt one.

给婴儿取一个没有被官方认可的名字,是违法的,至今仍是如此,完全不被允许,领养也不行

耶鲁公开课 - 1871年后的法国课程节选

It was against the law for Julius Caesar to do that, but he did it anyway.

恺撒这么做是违法法律的，但他就是这么做了。

耶鲁公开课 - 新约课程节选

But actually, hazing is illegal but a remarkably successful tool.

实际上，捉弄他人是违法的,但它却是非常有效的一种手段。

耶鲁公开课 - 心理学导论课程节选

It's against the law. It's an illegal contract.

因为那是违法的,这是个无效合同

耶鲁公开课 - 博弈论课程节选

It's illegal.

它是违法的

耶鲁公开课 - 博弈论课程节选

All right, so it might be that again, the problem with enforcement, although actually in 1880 America, it's not clear that they couldn't have enforced that contract.

好的,但是我刚才说了强制性的问题,虽然说那是1880年的美国,当时这种合同是否违法没有明确的界定

耶鲁公开课 - 博弈论课程节选

First of all it's illegal.

首先这是违法的

耶鲁公开课 - 博弈论课程节选