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 UID307600 帖子2907 积分7213 学分13422 个 金币41 个 在线时间649 小时 
    
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                 review: 1,虽然时代已经改变了,但是他并没有跟着它一起改变。
 although times has changed, he is  in step without any change.
 
 at the cost of"以······为代价"
 
 for instance:
 1,the fox escaped from the trap at the cost of a leg.
 狐狸虽逃出了陷阱,但却失去了一条腿。
 2,he earned a lot of money but at the cost of his health.
 他挣了很多钱,却以牺牲了自己的健康为代价。
 
 practice:
 1,他把她从火中救了出来,但是却付出了生命的代价。
 2,我们必须珍惜用我们自己的鲜血获得的经验。
 
 try to translate these sentences into english.
 
 references:
 
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