turn down 和turn off 的含义,用法与区别

turn down 和turn off 的含义,用法与区别 turn down与turn off的区别 turn off turn no turn up turn down 区别用法 Close,turn off,shut,shut down 的区别?与用法? turn off,turn on,turn down,turn up的用法 turn off与close down的区别 close down与turn off的区别 turn it off 与turn it down,的区别 close down 和turn off的区别 get off与close down与turn off的区别 turn on和tuen up以及turn off和turn down的区别 go off和turn off的区别和用法