1. 语法讲解：
“have + a / an +名词”相当于与该名词相对应的动词
“have +名词”中have没有实际的意思。常见此类用法的词有：
have a swim = swim have a bath = bath
have a walk = walk have a look = look
have a try = try have a quarrel = quarrel
have a wash = wash have a sleep = sleep
2. It obviously could not tell the difference between Indian music and jazz!
显然，它分辨不出印度音乐和爵士乐！
知识点：tell the difference between A and B意思为“辨别A和B之间的不同之处”；tell作“辨别”时，常与can/could/be able to连用：
This little boy is able to tell the difference between dollar and pound.
这个小男孩能够分辨出美元和英镑的不同。
3. After a time, we noticed a snake charmer with two large baskets at the other side of the square, se we went to have a look at him.
过了一小会儿，我们注意到广场的那一边有一个带着两个大篮子的耍蛇人，于是就走过去看看。
知识点1：after a time-after a while 过了一小会儿
知识点2：介词短语with two large baskets和at the other side of the square 作snake charmer的后置定语。
知识点3：went to have a look实际是两个动作，went为谓语动间，to have a look为非谓语动词，可译为“走过去看看”。
