human milk短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 人乳 There are about30 different enzymes in human/span> milk. The source, chemical properties, physiological significance of8 important enzymes for human milk are discussed in detail in this review. 人乳中大约含有30多种酶类，本文讨论了其中八种主要酶类的来源、存在形式、化学特性、生理意义。 chemyq