an·ces·try /ˈænˌsɛstri/
 祖先,世系,血統


 An·ces·try n.
 1. Condition as to ancestors; ancestral lineage; hence, birth or honorable descent.
    Title and ancestry render a good man more illustrious, but an ill one more contemptible.   --Addison.
 2. A series of ancestors or progenitors; lineage, or those who compose the line of natural descent.

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 ancestry
      n 1: the descendants of one individual; "his entire lineage has
           been warriors" [syn: lineage, line, line of descent,
            descent, bloodline, blood line, blood, pedigree,
            origin, parentage, stemma, stock]
      2: inherited properties shared with others of your bloodline
         [syn: lineage, derivation, filiation]