Watching TV has both advantages and disadvantages. On one hand, it can broaden our horizons. We can learn about different cultures, news from all over the world through various channels. For example, documentaries can show us the mysteries of nature and the long - established history of human beings. Also, some educational programs are very helpful for students to study. They can supplement the knowledge learned in school. However, if we watch TV for too long, it will do harm to our eyesight. Moreover, some people may become addicted to TV shows and waste a lot of time that could be used for more meaningful things like reading books or doing sports. In conclusion, we should watch TV in moderation. (看电视有利有弊。一方面,它能拓宽我们的视野。我们能通过不同的频道了解世界上不同的文化、新闻。例如,纪录片能向我们展示自然的奥秘和人类悠久的历史。而且,一些教育节目对学生学习很有帮助,它们能补充在学校学到的知识。然而,如果我们看太长时间电视,会损害我们的视力。此外,一些人可能会沉迷于电视节目,浪费很多本可以用于更有意义的事情的时间,比如读书或者做运动。我们应该适度看电视。)