moncherisii
Teachers help students correct their mistakes and teach them what they do not know.

雨中之苇
Teacher helps students check and make up for their shortages.漏和缺是指没有复习到的,应是shortage,短处。而deficiencies是指零件,工艺品上的制造缺陷,leak是指因密封不好产生的漏泄,所以都用在这里都不太合适。