But if you are so inclined whether for this problem set or any other throughout the term, you can change your mind week to week.

但是如果你倾向哪套题,那么你可以按周改变想法。

哈佛公开课 - 计算机科学课程节选

So, if you have any negative numbers you'd have a problem, right?

所以如果中间有负数就会有问题

耶鲁公开课 - 金融市场课程节选

And in terms of using these equations in solving problems on the exam, and also using these constants, make sure if you think there might be any chance you're going to get any little part of a problem wrong or do a calculation inaccurately, you need to write out every single step of your thinking as you write out these problems.

而当你在考试过程中用这些公式,来解题时，加上运用这些常数，如果你觉得有可能,在某一小问上出错,或者出现计算错误，请务必把你的思路一步一步地都写出来,当你在答题的时候。

麻省理工公开课 - 化学原理课程节选

If there's any problem with his appearing, I will email you.

如果他来不了我会以电子邮件通知

耶鲁公开课 - 金融市场课程节选