The first book is really a kind of preamble to everything that follows.

第一部即点明,往后的一切发展。

耶鲁公开课 - 政治哲学导论课程节选

Aristotle writes in Book II of the Politics that the world is eternal and everything in it has been discovered.

亚里士多德在《政治学》第，II，册中提到,世界无穷止境,其中所有事物都已创建。

耶鲁公开课 - 政治哲学导论课程节选

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