在出门之前烘干头发 Make sure your hair is dry before going outside
出门之前
Before going out
以上为机器翻译结果，长、整句建议使用 人工翻译 。
我的房间很乱，但我今晚出门之前不必打扫。
My room is a mess, but I needn't clean it before I go out tonight.
youdao
“我有自己的计划。”他在我走出门之前说。
"I have my plans," he said, in the moments before I walked out the door.
我出门之前，把煤气的总阀关掉了。
I turned the gas off at the mains before I went out.
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