先生给我们留了许多道题要解答。

The tepainr left us lots of problems to solve.

youdao

我认为这是一个要测验问题，也许是第五道题。

Which — I think this is a quiz question here, probably number five.

youdao

表3显示了每门db2考试有多少道题，要通过考试需要答对多少道题，以及每门考试的时间。

Table 3 shows how many questions are on each DB2 exam, how many you need to correctly answer to pass, and how long you have to take the exams.

youdao

But remember that you do have recitation on Tuesday, so that could be very helpful with the problem-set, so be sure to go to recitation on Tuesday, and have a great long weekend.

记住，周二有习题课，这对做课后题很有帮助，所以周二一定要来上习题课，周末愉快！

麻省理工公开课 - 化学原理课程节选

So when you go ahead and draw these on your problem-sets or on your exams, it's a good idea to put these dashed lines in, both for you and for people reading it to see exactly where your molecular orbitals are coming from.

所以当你在做课后题,或者考试的时候要画这些图时，最好把这些虚线放进去，既方便你自己也方便别人知道,这些分子轨道是从哪里来的。

麻省理工公开课 - 化学原理课程节选

Because if b was odd, then b minus one is even which means on the next step, I can cut the problem in half again.

这意味着我在下一步里解决的问题,规模要小了一半，好，课堂材料的第三题。

麻省理工公开课 - 计算机科学及编程导论课程节选