You have to have students start the class and you have to have a class get students interested.

你需要有学生来开始一门课程，同时你还需要一门课程来吸引学生。

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It always takes the class a while to settle down at the start of the lesson.

那个班一上课总得过一会儿才能安静下来。

《牛津词典》

Professor Hinkle made it a practice to start class every morning promptly at nine o’clock on the dot.

欣克尔教授习惯于每天早上九点正开始上课。

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So, normally at this point, we do actually start class with a little bit of history from alchemy to modern chemistry, but I decided to skip that this year.

通常在这个时候,我们要从一些从炼金术,到现代化学的历史出发正式开始我们的课程。

麻省理工公开课 - 化学原理课程节选

So, this will be a little bit more like a seminar to start with, and a little bit less like a lecture in class.

所以着看起来有点像是讨论课，而不是讲课。

麻省理工公开课 - 化学原理课程节选

We're going to really get into this next class, but I just want to introduce it to you to give us a start, and many of you have used Lewis structures in high school, but we'll be doing some much more challenging Lewis structures, I can assure you, in this class here.

其实我们下节课才会详细介绍它，但是今天我只想以简单介绍作为开始，大部分同学在高中就用过路易斯结构了，但是我们会遇到一些更具挑战性的,路易斯结构，我可以向大家保证，在这门课中会的。

麻省理工公开课 - 化学原理课程节选

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