growth medium短语¹⁴⁴⁹⁷²⁺² 基本例句 培养基 In response to the appearance of such variants in the cell population the concentration of the toxic chemical in the growth medium is increased, thus keeping the selection pressure constant. 为应对细胞污染中出现的变异，有毒物质的浓度是逐步增加的，以此保证筛选力度的稳定。 yeeyan