These are all plausible reasons and possible contributors but nobody's got the home run answer yet.

这些原因听起来都很有道理,但还没有人能给出准确的答案

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

That is correct, but you don't want to give it a definite push.

这没错,但你没有给出一个确定的推力

耶鲁公开课 - 基础物理课程节选

So it's really neat to think that your counterparts 100 years ago right here at MIT could have been sitting in a class where they had Lewis as their lecturer, and he's putting forth these ideas -- these are actually his lecture notes, even though it wasn't even published yet, and giving this idea of Lewis structure, which is exactly what we keep using today in order to make a lot of these predictions.

因此会有很棒的感觉，当想一想一百年以前像你们一样,在这上学的同学可能正坐在教室里,听路易斯讲课，而他正在提出这些想法-,-而这些正是他的课堂讲义，尽管当时还没有发表，但已经给出了路易斯结构的思想，这正是我们直到今天都一直在用的,用它来做很多预测。

麻省理工公开课 - 化学原理课程节选