问：那么告诉我们，你所经历的训练，是以什么开始的？

Question: So tell us the training you went through, to start out with?

youdao

那么请告诉我们，你为什么决定开一家咖啡馆？

So please tell us, why did you decide to open a cafe?

youdao

那么，科学告诉我们地板上的几分钟对你的食物安全意味着什么呢？

So what does science tell us about what a few moments on the floor means for the safety of your food?

youdao

So, step five tells us to add 2 electrons between each atom, so we add two there.

那么，第五步告诉我们在两个原子之间放上两个电子，因此我们在这放上两个。

麻省理工公开课 - 化学原理课程节选

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

Lithium has three electrons. If it loses two one remains. What is this formula telling us?

锂原子有三个电子，如果它失去两个,剩下一个，那么这个式子告诉了我们什么？

麻省理工公开课 - 固态化学导论课程节选