单词 | precursor |
释义 | pre·cur·sor 1. a. < headaches … were the precursors of breakdown and helpless invalidism — V.S.Pritchett > b. < Greek mathematics was the precursor to modern mathematics — Harry Lass > 2. < ethyl alcohol is the precursor of acetic acid in the formation of vinegar > — compare provitamin, zymogen |
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