Plant says this definition, which first appeared in a 1930 ILO Convention Against Forced Labor, is still valid today.

VOA: standard.2009.08.21

if the Law of Inertia is valid for me, it's valid for other people in the same room at rest with respect to me.

如果惯性定律对我适用,那就对这屋子里的其他和我保持相对静止的人,也同样适用

耶鲁公开课 - 基础物理课程节选

It is in fact syntactically valid.

这只是语法上说得通。

哈佛公开课 - 计算机科学课程节选

White House Press Secretary Robert Gibbs said Wednesday no Iranians have responded to the invitations thus far, and that in any event they are no longer valid.

VOA: standard.2009.06.24

and so I trust that it's easily intelligible as I read it to you now.] In fact, however, we have given up the claim to find, in the past, any truth valid and intelligible for ourselves.

所以我相信现在我读的时候大家一定会更容易理解],事实上，我们已经放弃了从过去中寻找,对于自己来说靠得住的，可以理解的事实。

耶鲁公开课 - 文学理论导论课程节选

"Definitely being in a different country and learning about American culture, American education system and everything else geting a degree here will definitely be valid back in my country so I am very lucky to be here and my goal right after graduation I want to look for some sponsorship opportunities and also being able to stay in the United States to do some kind of work with some Tennis academy and travel a litle bit and play in some Tennis tournaments."

VOA: standard.2009.12.14