问题描述：
A greenhouse is a building made of glass which is used for keeping plants warm when the outside
A greenhouse is a building made of glass which is used for keeping plants warm when the outside temperature is how.
这句话的意思是?望行家指点.
A greenhouse is a building made of glass which is used for keeping plants warm when the outside temperature is how.
这句话的意思是?望行家指点.
问题解答：
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