批注6:可能我没表达清楚,because he/she does not learn some prerequisite courses for the courses arranged the following year是建立在since there may be some significant differences between the curriculum of a foreign college/university and that of a student’s own college/university这个大前提之上的,课程不同可能导致衔接不当。比如你第一年学微积分,出国发现又学了一年微积分,回来以后发现线性代数漏了没学,。。。。。