duplicate a key的意思|示意

I've locked myself out. Could I have a duplicate key?

我把自己锁在门外了。可以给我一把备用钥匙吗？

This could result in a significant decrease in performance should there be a large number of duplicate key values.

如果有大量重复键值，这可能会导致性能大幅降低。

I've locked myself out. Could I have a duplicate key?

我把自己锁在门外了。可以给我一把备用钥匙吗？ ？

If you lost your key, I can give you a duplicate.

如果你把钥匙丢了，我可以给你一把复制的。

I forgot to bring my key when I left the room. May I borrow a duplicate key for room 402, please?

我离开房间时忘记带钥匙了。我能借用402房间的备用钥匙吗？缝。

There is a duplicate key violation example on that page.

有一个例子在这个页面复制钥匙违反。