down pat

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Thoroughly practiced, rehearsed, or understood; mastered. not-comparable
    — to have … down pat

词源

Unknown, but clearly related to pat (“suitable, fitting”, adjective) and pat (adverb); possibly related to pat (“light tap”) in the sense of hitting the mark.
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