柯林斯词典substrate /ˈsʌbstreɪt/ 1. N the substance upon which an enzyme acts 基质[biochem] 返回 substrate剑桥词典biology a substance or surface that an organism grows and lives on and is supported by 基质，培养基 chemistry a substance that an enzyme (= chemical made by living cells ) acts on to produce a chemical reaction 底物，酶作用物 返回 substrate