Make sure your hair is dry before going outside.
外出前确保你的头发干。
How many times have I told you to put your jacket on before going outside?
我跟你说过多少次了，出去前要穿上夹克？
He stood outside the house before going in.
他在进去之前曾站立在那屋子的外边。
I have 30 more minutes to play outside before going home to finish my homework!
在回家做作业前我还可以在外面玩30多分钟！
I have 30 more minutes to play outside before going home to finish my homework!
在回家做作业前我还可以在外面玩30多分钟！
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