They are proof that the best thing that can happen to a man is to be born lucky.

VOA: special.2010.03.27

So some people believe that Christians, precisely because they wanted to proof text a lot, they wanted to run around through a lot of different texts, they actually invented the codex.

所以有些人认为，想核对经文的基督教徒，需要查阅很多不同的经文，于是他们发明了抄本。

耶鲁公开课 - 新约课程节选

4 So this is 16 times 4 equals 64 and though this is not proof by any means, it's not a formal proof because here is one example that happens to prove my point.

所以是16*4，即,尽管如此，这并不是严格的证明,因为是这个例子碰巧证明了我的观点。

哈佛公开课 - 计算机科学课程节选

Professor Yoshino explains. "Shakespeare calls this a problem of ocular proof, the idea that we need to see evidence before we believe in it -- and that,oftentimes, when metaphysical questions of guilt or innocence are difficult for us to answer, we have a tendency to reduce them to questions that pertain to physical evidence.

VOA: special.2011.06.06

Welles said, forgive me for repeating myself from a previous class, Welles said the problem with Citizen Kane is that it just look like a young film maker trying to set proof to the world that he can make movies. That's exactly what it was.

请原谅我,又要重复上次课上的话，威尔斯说，《公民凯恩》的问题在于,它看起来就像是一个年轻的电影制作人,试图去向世界证明,他能够做电影，的确是这样。

麻省理工公开课 - 电影哲学课程节选

He says Poland is now ready to be a responsible co-leader in Europe, and this signature is proof of that.

VOA: standard.2009.10.10

But if a farmer is given the opportunity to access and then makes a decision to buy, I think that's the real proof that this is something that's beneficial to them."

VOA: standard.2010.08.09

In his request to be relieved of duty, General Fonseka asked the president to allow him to keep a security detail, including trained combat soldiers, and a bullet proof vehicle, saying the defeated rebels are yet capable of trying to kill him.

VOA: standard.2009.11.14