update README.md

README.md

@@ -149,7 +149,7 @@ See [usocket](http://docs.micropython.org/en/latest/pyboard/library/usocket.html
 ```
 >>> import usocket 
 >>> s = usocket.socket(usocket.AF_INET,usocket.SOCK_STREAM) #TCP连接
->>> s.bind(('192.168.12.32', 6001))
+>>> s.bind(('192.168.12.32', 6001))   #绑定自身IP地址和端口号
 >>> s.listen(5)
 >>> s.setblocking(True)
 >>> sock,addr=s.accept()              #阻塞等待tcp连接，并接收数据
@@ -157,8 +157,8 @@ See [usocket](http://docs.micropython.org/en/latest/pyboard/library/usocket.html
 b'rt-thread\r'
 >>>
 >>> s1 = usocket.socket(usocket.AF_INET,usocket.SOCK_STREAM)
->>> s1.connect(("192.168.10.110",6000))
->>> s1.send("micropython")            #发送成功后返回发送字节数
+>>> s1.connect(("192.168.10.110",6000))  #连接目标IP地址和端口号
+>>> s1.send("micropython")               #发送成功后返回发送字节数
 11
 >>> 
 ```