Pilar made an extra copy of her house key and gave it to her aunt for safekeeping.
皮拉尔配了另外一把家里的钥匙并把它交给她的阿姨妥善保管。
Scan your passport, identification card, and itinerary and email them to yourself. This provides an extra copy of each in the event of loss or theft.
扫描护照、身份证及行程路线等文件，然后发到自己邮箱里，这样万一丢了或被偷，你还有备份。
They mailed us an extra copy over and above the books we'd ordered.
除了我们预订的书外，他们还给我们多寄了一本。
Often, the error resulted in an extra copy of chromosome 21, which causes Down's syndrome.
通常情况下，错误导致21号染色体的多余复制，引发唐氏综合症。
We can still offer users all the advantages of that extra copy on disk without exploding their mental model.
我们仍然可以在不破坏用户心理模型的情况下，为用户提供磁盘上另一份复制的所有好处。
We can still offer users all the advantages of that extra copy on disk without exploding their mental model.
我们仍然可以在不破坏用户心理模型的情况下，为用户提供磁盘上另一份复制的所有好处。
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