We're also posting a practice exam for you to take, so after you're completely done your studying, it's good to have everything done before you take the practice exam, and then sit down just with this sheet here and your calculator, and ideally a timer, and make sure you can do the practice exam in the allotted amount of time.

我们还将给出一份模拟试题，因此在你完全复习好之后，最好先复习完,再做这份模拟试题，坐下来,只拿出这张表与计算器，最好还有个计时器，确保自己完成模拟题,在规定的时间内。

麻省理工公开课 - 化学原理课程节选

I think the book has a fairly good description of it so if you don't pick up everything in the lecture, hopefully you've read that beforehand, and you can go back to it afterwards and read about things that didn't make sense.

我认为课本对DNA表述很详细,所以在课堂上无需面面俱到,希望你们之前做过预习,课后你们可以通过复习,弄懂那些不甚理解的地方

耶鲁公开课 - 生物医学工程探索课程节选