I was so proud of myself getting the lecture notes finished early and handing them in to CopyTech, and then I realized we didn't do electronegativity on Wednesday.

我感到很自豪,对自己能够提前做完讲义,并交给复印中心但是之后我才想起来,我们周三没有讲电负性。

麻省理工公开课 - 化学原理课程节选