1. 名詞
   duplication複數: 複製, 複印
   複寫
   副本, 複本
   成倍, 成雙
   

   同義字詞
   alter ego,carbon,carbon copy,clone,counterpart,double,duplicate,facsimile,image,likeness,look-alike,match,mirror image,picture,replica,ringer,spit,spitting image,twin
   carbon,carbon copy,clone,copy,dummy,dupe,duplicate,facsimile,imitation,mock,reduplication,replica,replication,reproduction
   iteration,redo,reduplication,reiteration,renewal,repeat,repetition,replay,replication,reprise
   

例句

1. Although duplications do occur, they are unstable.
2. Duplications play a major role in shaping the genome.
3. Duplications are a doubling of a section of the genome.
4. Each username is unique; duplications are not accepted.
5. Therefore, there were duplications in patterns and designs.
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