make chan power

Author: 刘建秋

EN/channel/channel-1.md

@@ -73,6 +73,11 @@ usage
 If the coroutine only writes to a channel, the channel is declared as write-only.
 If the coroutine only has a read operation on a channel, the channe is declared read-only.
 
+```
+onlyread := make(<-chan int) //create only read channel
+onlywrite := make(chan<- int) //create only write channel
+```
+
 ```
 // Only the generator writes outCh and returns the statement
 // <-chan int, can prevent other coroutines from using this channel indiscriminately, causing hidden bugs

zh_CN/channel/channel-1.md

@@ -73,6 +73,11 @@ select可以同时监控多个通道的情况，只处理未阻塞的case。当
 如果协程对某个channel只有写操作，则这个channel声明为只写。
 如果协程对某个channel只有读操作，则这个channe声明为只读。
 
+```
+chonlyread := make(<-chan int) //创建只读channel
+chonlywrite := make(chan<- int) //创建只写channel
+```
+
 ```
 // 只有generator进行对outCh进行写操作，返回声明
 // <-chan int，可以防止其他协程乱用此通道，造成隐藏bug