duplication
/ˌdjuːplɪˈkeɪʃən/noun
mass noun
1- the action or process of duplicating something复制; 复印; 复写。
1.1
- count noun Genetics a DNA segment in a chromosome which is a copy of another segment【遗传】（染色体中DNA的）重复段。
词源
late Middle English （used in the mathematical sense 'multiplication by two'）： from Old French, or from Latin duplicatio （n-）, from duplicare 'to double' （see DUPLICATE）.