在许多电话机和传真机上都有一个功能键，名为“音乐等待”，或“音乐保持”，英文名为“ＨＯＬＤ”。有不少人不知其含意，它的功能也没有好好地被发挥出来。英文“ＨＯＬＤ”的意思是“保持，握住”，在电话通信中，它的含义是：“保持线路不中断。” 那么“音乐等待”究竟怎 On many phones and fax machines there is a function key called “Music Waiting,” or “Music Retention,” and the English name is “HOLD.” Many people do not know their meaning, and its functions have not been well played out. English “HOLD” means “hold, hold”, in the telephone communication, its meaning is: “keep the line is not interrupted.” So “music waiting” what exactly