Join the conversation, take a pop quiz, watch lectures you've missed and learn a lot more.

参与到我们的讨论中来，做一个小测试，查看遗漏的讲义，并学更多知识。

耶鲁公开课 - 公正课程节选

I have the freedom to pass that person because I like the trend. Suppose I have somebody else who came here with two years of chemistry in high school, got a 95 on the first test, 70 on the second test, failed the third test, failed the final, has an aggregate score of 48.

我能够选择让那人通过,因为我喜欢他的进步，假设另一个同学,学了2年的化学在高中,第一次测试得到95分，第二次70分，第三次没通过，期末考也没通过。

麻省理工公开课 - 固态化学导论课程节选