The accepted scenario was a simple case of evolutionary selection. In a bacterial population exposed to a killer drug, a few lucky individuals might have a genetic mutation that kept them alive.
我们本以为这是再简单不过的进化选择了：当药物杀向全体细菌时，总有那么几个幸运儿，基因突变了，小命保住了，它们可以活下来继续繁殖下一代，而剩下的那些倒霉蛋就从此命归黄泉了。
A competing theory is that a mutagenesis drug may eradicate a virus or bacterial population by reducing the fitness to negative values.
一个竞争性的理论是诱变药物通过降低对负面价值的适应性而根除病毒或细菌群体。
In a bacterial population exposed to a killer drug, a few lucky individuals might have a genetic mutation that kept them alive.
当一个具有相当数量的细菌种群与一种杀菌剂“狭路相逢”时，只有少数幸运的细菌可以基因突变从而存活下来。
A culture flask for determining bacterial cell population of surfactant producing bacteria(SPB) is prepared.
研制了测量产表面活性剂菌（SPB）菌数用的测试瓶。
You may think your office is tidy, organized and clean, but the truth would likely shock you — the bacterial 1 population in offices is on average 400 times higher than in bathrooms.
你或许认为你的办公室干净整齐有条理，但是事实可能会让你大吃一惊：办公室的细菌群数量是卫生间的400多倍。
The soil nutrient index calculated from bacterial population indicated that the nutrient levels of the four grass-forest systems were very low, only between 0.003 and 0.014.
根据微生物数量计算的土壤营养指数表明，4种草林系统的营养级别都极低，土壤营养指数仅0.003~0.014。
The soil nutrient index calculated from bacterial population indicated that the nutrient levels of the four grass-forest systems were very low, only between 0.003 and 0.014.
根据微生物数量计算的土壤营养指数表明，4种草林系统的营养级别都极低，土壤营养指数仅0.003~0.014。
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