All your TA's have either already have their extra office hours, or there are some that will be going on tonight or tomorrow, so keep those in mind as your finishing up your studying for the exam.

你们的助教们有的已经做过额外的答疑，而有的会在今天晚上或者明天答疑，因此在你复习准备,考试的时候不要忘了这些。

麻省理工公开课 - 化学原理课程节选

The other quick thing I want to say is that I do have office hours today from 3 to 5, so feel free to stop by if you have questions about problem-set 3 that you're finishing up.

我还想说一件小事,我今天的答疑时间是三点到五点，如果你对于第三次作业还有任何疑问,请在这个时间段来找我，不必客气。

麻省理工公开课 - 化学原理课程节选

And also, keep in mind that I have office hours today from 3 to 5.

还有一件事就是,要记住我的答疑时间是今天下午三点到五点。

麻省理工公开课 - 化学原理课程节选