turn down 同 turn off?

turn down =
1. 轉小,減少(光亮,火焰,聲響)
2. 拒絕(請求等)
3. 拉下來,摺下來(衣領,帽簷)

turn off=
1.關掉;關閉

turn down=調低
turn off =調到最低{=關上}