up与down的区别
问题描述：
up与down的区别
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答
我个人认为二者的区别不大(1)burn down:destroy (sth.) or be destroyed by fire 烧毁The city was burnt down by the enemy.这座城市被敌人烧毁了.A fire burnt the house down in half an hour.大火在半小时内将房...