So let's have a clicker question here on how many total pi bonds do you expect to see in benzene?

让我们来做个课堂习题,你们觉得苯环里有一共多少个π键？

麻省理工公开课 - 化学原理课程节选

All right, so OK, it looks like we have a very mixed response in terms of the answer to the clicker question today.

好的，看来今天课堂,习题的答案比较多样。

麻省理工公开课 - 化学原理课程节选

And so what you'll be pointed 0 to in Problem Sets One PDF is something we call the CS50 Style Guide.

所以你们将会被指出,在习题集1中，PDF是我们CS50课堂0,编码风格指南。

哈佛公开课 - 计算机科学课程节选

And what is the shape, for one more clicker question on ammonia?

那它的形状呢？,再来一道关于氨分子的课堂习题？

麻省理工公开课 - 化学原理课程节选