The event,on July sixteenth, was a rare chance for planetary scientists to share with the public the mysteries of Mars.

VOA: special.2010.07.28

So, if any of you doesn't want to be, by chance, seen on the Internet, then sit out of range of the camera.

如果你们不想要，意外地，出现在网上的话，那么就坐在摄像机拍摄的范围外。

麻省理工公开课 - 固态化学导论课程节选

For those of you just walking in now, you might not have a chance to get all of the thought process that you need in on this clicker question, because it is based on a Lewis structure, so we will go over it.

那些刚刚进来的同学，你们可能没有机会时间来回答,因为答案是基于Lewis结构上的,所以我们赶紧看一下。

麻省理工公开课 - 化学原理课程节选

President Buchanan had promised the people of Kansas that they would have a fair chance to vote on their constitution.

VOA: special.2009.05.21

He believed it might be best to let Lee escape than to take a chance on losing what remained of the Army of the Potomac.

VOA: special.2009.11.05

This was it. What could be an impossible effort in the history of spaceflight was ready to lift off on its final chance for success.

VOA: special.2009.07.01

Israel offered less hope of an early resolution to the conflict, when Foreign Minister Avigdor Lieberman said on Israeli radio Thursday that there is no chance of peace anytime soon.

VOA: standard.2009.10.08

"We don't want to rob people of a constitutional right but - I kind of don't like saying this, but I'm going to do it, and that is - to err on the side of protection is the chance sometimes we have to take."

VOA: standard.2010.05.06