Keep the Windows open in fine weather.
天气晴朗时，应把窗户打开。
让窗户开着。
You'd better not keep the Windows open.
你最好别让窗户开着。
Must we keep the windows open all the time?
我们必须一直开着窗吗？
It's very hot today. Please keep the Windows open.
今天天气很热，请把窗户打开着。
Please keep the windows open. We need more fresh air.
请让窗户开着，我们需要更多的新鲜空气。
You should keep the Windows open to ventilate the room.
你应该让窗户都开着，好让房间通风。
Don't keep all the Windows open.
别把所有的窗子都开着。
The door and windows should be open to keep the air fresh.
公共厕所应及时开门开窗换风换气，厕内无明显臭味。
The door and windows should be open to keep the air fresh.
公共厕所应及时开门开窗换风换气，厕内无明显臭味。
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