If the student hasn't mastered the basic concept, we will make sure that the grade scheme gives a failing grade.

如果学生没有掌握基本的概念，我们会确保,成绩将会不及格。

麻省理工公开课 - 固态化学导论课程节选

It decreases. If you're still not completely up on the periodic trends, that is stuff that's going to be on the first exam, so make sure that you're able to do this without taking too much time to think about it.

它会降低，如果你还没有完全掌握周期性规律，而这是第一次考试要求的内容，因此请务必做到不用,想太久就能做到这点。

麻省理工公开课 - 化学原理课程节选

If the person has not mastered the basic concept, the person must fail, must get four or less.

如果他没有掌握基本的概念，那就一定不能通过考试，只得十分之四或更少。

麻省理工公开课 - 固态化学导论课程节选