turn on 打开
turn off 关闭
turn up 调大；出现
turn down 调小；拒绝等同refuse，后面一般接的是to do
【例句】
Father is sleeping. Will you turn down the radio a little?
——Ok. I'll do it right now.
【例句】
The famous movie star didn't refuse to help the poor children.
refuse v.拒绝
refuse to do sth 拒绝做某事
hung v.悬挂；垂下
hang out 闲逛
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