•Can you duplicate (= use a special machine to copy) this document for me?你能为我复印一下这份文件吗?

•Parenthood is an experience nothing else can duplicate.当父母是任何其他经历都无法比拟的。

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•The thieves were equipped with duplicate keys to the safe.窃贼带着配好的保险柜锁匙。

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•I lost the original form so they sent me a duplicate.我把表格的原件给丢了，所以他们又发给了我一份副本。