It might, for instance, be used to warm buildings.
例如用来取暖。
It was for serving wine. The big bowl was used for keeping the wine warm.
它是专门为白酒服务的。这个在的碗是用来保持白酒的温度。
Cotton has been used for over three thousand years, especially in warm countries.
棉花已经被使用了三千多年，尤其是在温带国家。
Were they used for keeping warm?
它们是用来保温的吗？
Were they used for keeping warm?
它们是用来保温的吗？
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