So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.

那么让我们来做一个小选择题，请大家来告诉我,氟有多少个价电子，要记得，价电子与芯电子不同，它们是在最外壳层的最靠外面的电子。

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

3 So here what I'm doing is 17 divided by 13, but because of this parenthetical, , -- because of that parenthetical -- that has nothing to do with math; -- this is a programming language thing -- that is a casting operation.

所以这里我要做的是用17除以，但因为这样的题外话，因为那样的题外话-,还是没有做完这个数学题;,这是一个编程语言的东西-,那是一个计算操作。

哈佛公开课 - 计算机科学课程节选

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

我认为这是一个要测验问题,也许是第五道题

耶鲁公开课 - 聆听音乐课程节选

Whether that would ever happen, if Pynchon had decided to let us in on the secret, I don't know. Pynchon, instead, chooses to end the novel before that moment, and so we're left with a kind of emptiness.

如果说Pynchon是想要，让这成为一个谜题的话，那我也不知道，究竟出现了，没有取而代之的是Pynchon选择了,在那一幕之前让小说戛然而止，让我们陷入了，一片空白之中。

耶鲁公开课 - 1945年后的美国小说课程节选