n. 完全一样的东西, 复制品( duplicate的名词复数 ); 抄件, 副本; 摹本; 翻版

v. [遗传学]重复, 被复制, 复制( duplicate的第三人称单数 ); 复印; 使成双

n something additional of the same kind

n a copy that corresponds to an original exactly

v make or do or perform again

v duplicate or match

v make a duplicate or duplicates of

v increase twofold