为什么是turn it down 不是turn down it,但是又是turn off the TV不是turn th

为什么是turn it down 不是turn down it,但是又是turn off the TV不是turn th 为什么是turn off the TV 不是turn the TV off?而有turn it off? turn it off 与turn it down,的区别 turn it down 翻译 1.turn on turn off turn down turn up turn on/turn off/turn up/turn down/ turn off turn no turn up turn down 区别用法 turn off,turn on,turn down,turn up的用法 turn down it和turn it down的区别是什么? turn it down 什么意思? turn it down a litter turn down turn up