区必须有足够的通风。
The room should be dark, well ventilated, and as quiet as possible.
屋子里应该光线很暗，通风，尽可能的安静。
It must be used in a well-ventilated room.
必须在通风条件好的房间里使用。
The tunnel would be well-ventilated if tall chimneys were built above sea level.
如果再建些伸出海面的高大的烟囱状通风管，隧道就具备了良好的通风条件。
The tunnel would be well-ventilated if tall chimneys were built above sea level.
如果再建些伸出海面的高大的烟囱状通风管，隧道就具备了良好的通风条件。
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