Honey is sweet, buf the bee stings.

蜂蜜好吃，但蜜蜂蜇人。

If we specify an unbuffered stream, the buf and size arguments are ignored.

如果我们指定一个无缓存的流，buf和size参数被忽略。

To enable buffering, buf must point to a buffer of length BUFSIZ, a constant defined in.

打开缓存，buf必须执行一个长度为BUFSIZ的buffer，它在头文件中定义的常量。

The API prints out the memory state of sizeof (buf) + 1 bytes, starting at memory address buf.

API打印出了size of (buf) + 1 bytes的内存状态，从内存地址buf开始。

The Length of the string is automatically set to the right value after assigning buf to the string.

把缓冲区赋值给字符串后，字符串的长度将自动设置成正确的值。