I disagree with the statement that zoo has no useful purpose. I think zoo has at least two purposes. Firstly, it gives children a good opportunity to learn about the animals on the world. It can induce their love of the animals and in their future, they will have a sense to protect them, that is very important to our environment. Secondly, it also give us a good opportunity to relax on weekends. Looking at the cute animals, our mind will get off from the troubles and have a good relax. 绝对超时 前面不要讲废话