1.something additional of the same kind;
he always carried extras in case of an emergency
2.a copy that corresponds to an original exactly;
he made a duplicate for the files
3.identically copied from an original;
a duplicate key
4.being two identical
1.make or do or perform again;
He could never replicate his brilliant performance of the magic trick
2.duplicate or match;
The polished surface twinned his face and chest in reverse
3.make a duplicate or duplicates of;
Could you please duplicate this letter for me?
4.increase twofold;
The population doubled within 50 years
简介形容词 1. 完全一样的;复制的;副本的 He opened the door with a key. 他用一把复制的钥匙打开了门。 2.二重的;一对的;二倍的 3.【牌】复局的 名词 1. 完全一样的东西;复制品;副本[C] Keep a of the letter. 保存一份信的副本。 延伸 复制;复写;影印,拷贝 All the members received notices of the meeting. 所有会员都接到同样的会议通知。 2.重复 3.使成双;使加倍