ENOB有效位数enn.半方；N 字prep.作为；一起；在 ... 中Enzymological Character酶学性质enumeration description枚举描述enzymatic determination酶测定encapsulation condition成囊条件encephalitis lethargica埃科诺莫氏病Encephalomyelitis virus脑脊髓炎病毒envlronmental emergency环境应急envionmental background环境背景enol-keto tautomerism[机] 烯醇-酮互变异构现象enviornmental pollution环境污染