As soon as they were stopped at a main check post, the attackers lobbed several grenades and opened fire with automatic weapons on the soldiers there.

VOA: standard.2009.10.11

I want you to check in with either Hillary or Lori There is a lecture now Monday, Wednesday and Friday at 11:00.

我希望你们和Hillary或Lori确认,上课时间是周一，周三和周五的11点。

麻省理工公开课 - 固态化学导论课程节选

And so can we do a little sanity check with the simple case here?

对这个简单的例子我们能不能做完整性检查呢？

哈佛公开课 - 计算机科学课程节选

Senate Republican leader Mitch McConnell of Kentucky expressed his disappointment with Specter's decision, saying it could undermine Republicans' ability to put a check on the Democratic majority.

VOA: standard.2009.04.28

So that's just a little bit of a check for yourself, and it should make sense because what you're doing is you're calculating the difference between energy levels, so you just need to flip around which you put first to end up with a positive number here, and that's a little bit of a check that you can do what yourself.

所以你们总要确保括号，离得这项是正的，这是你们自己,可以做的检查，这事很有道理的，因为你们做的是计算能量差,所以你需要调整顺序来保证一个正数，这是你们自己可以做的检查。

麻省理工公开课 - 化学原理课程节选

Passengers are being encouraged to check ahead with their airlines, to arrive an hour earlier than normal and to bring only a single carry-on bag with them.

VOA: standard.2009.12.27

I differentiate a second time and check the sign, so the second order condition, I differentiate this expression again with respect to q1.

我们对它进行二次求导然后看符号,这个式子的二阶导数,就是一阶导数再对q1进行求导

耶鲁公开课 - 博弈论课程节选

"I was finishing my last semester of law school, so,I guess, check back with me in 30 years and see if he's a litigator, because he would definitely come alive in my corporations classes and he always heard my professors speaking."

VOA: standard.2010.05.05