If a person has the basic concept down, regardless of numerical errors, if the person has the basic concept down, he or she must get at least five out of ten.

如果一个人有一些基本的概念，不管一些数字上的错误，如果他有基本的概念，至少都能够得到一半的分。

麻省理工公开课 - 固态化学导论课程节选