英语语法分析

Simultaneously, ME rB exhibited cross resistance to DL methionine, as well as Threonine, Lysine, Isolecine, and Leucine separately or combinedly.

抗性系还表现出对DL-甲硫氨酸的交叉抗性和对天冬氨酸族其它几种氨基酸的抗性。

Objective To probe the clinical evaluation of tumor specific growth factor(TSGF), carbohydrate 19-9(CA19-9) and carbohydrate 242(CA242) combinedly in detecting malignant tumors in digestive tract.

目的探讨用恶性肿瘤特异性生长因子（TSGF）、糖抗原19 9（CA19 9）与糖抗原2 42 （CA2 42 ）联合检测对消化道恶性肿瘤的临床评价。