In recent years, more and more lectures are being given on campus. They are organized either by the departments or by the students' unions with an aim to improve the students' quality both mentally and academically. These lectures are usually in series and on different topics, such as arts, life, economy, psychology, world issues, etc. Generally speaking, the advantages of good lectures are various. First, they broaden the students' horizon and cultivate interests in different fields. Second, they make the life of the students colorful and enjoyable. With these merits, lectures are just complementary and subordinate to our school work. If students spend too much time attending lectures, their regular study will be affected and disturbed. So, in my opinion, the students should, on the one hand, do their class work and homework well first, on the other hand, make good use of their spare time to attend instructive lectures so as to enrich their knowledge.