Sergeant Perry Osburn put it this way: "We cannot let this make us afraid, you know what I'm saying?

VOA: special.2009.11.14

Milton's taking pains here, and he does this with very few other poems, to let us know precisely when it is that he's written it.

弥尔顿在这里极力想让我们，知道他确切的创作时间。

耶鲁公开课 - 弥尔顿课程节选

All right. If you have a conflict, please let us know.

好了，如果你有冲突，请告知我们。

麻省理工公开课 - 计算机科学及编程导论课程节选

Let us say I want to sell my car but I do not know exactly how much it is worth.

VOA: special.2009.04.12

So realize the support structure is now in place and in progress so do just let us know at help@cs50.net if you have questions that can't be addressed during office hours.

所以请意识到支撑结构已经出来了，并且正在进行,如果需要帮助，如果在课堂时间有任何不懂的问题,请在help@cs50，net上面给我,留言。

哈佛公开课 - 计算机科学课程节选

I don't know what this tells us about David and Nina, but don't let them off the hook quite yet.

从大卫和妮娜的协调中得不出什么结论,这事儿还没结束呢

耶鲁公开课 - 博弈论课程节选