Now, you know already, or you could review in Chapter 4 that I provided to you, something about how proteins work.

现在你们已经知道,或者读我给你们看的第四章,就能了解蛋白质的工作原理

耶鲁公开课 - 生物医学工程探索课程节选

And if you've forgotten about proteins and what their structure is you can go to Chapter 4 and read sort of a brief review of protein biochemistry.

如果你们忘记了蛋白质及结构的相关知识,就去读第四章,关于蛋白质生物化学的简短综述

耶鲁公开课 - 生物医学工程探索课程节选