这种方法一时间非常有效，但接着蚊子重磅回击——大自然的生存法则让蚊子大军有了抗杀虫剂的良好基因。
For a time, it was successful, but then evolution struck back, as natural selection favoured the spread of insecticide-resistant genes.
因此每一种生物都有它存在的意义，它们都在以自然的法则生存。
So each has its biological significance of the existence, they are in the natural law of survival.
适者生存，是自然的竞争法则，违背这一法则的企业和个人都会成为时代的弃儿。
Proper existence is a natural competition rule, disobeying the business enterprise of this rule with personal foundling that will become ages.
精品战略是自然法则，是激烈的市场竞争条件下的生存之道，也是提升生存和保障能力的必然选择。
Strategy of high quality is the natural principle, is the way of existence in conditions of severe market competition, and the necessary choice for improving ability of living and supporting.
根据人类生存离不开食物的自然法则，这两个不均等力量的影响必须保持均等。
By the law of our nature which makes food necessary to the life of man, the effects of these two unequal powers must be kept equal.
巴克和人类的关系，巴克和其它狗的关系，巴克和自然的关系都生动而深刻地阐述了适者生存这一生命法则。
Survival of the fittest is vividly and profoundly explained by the relationship between Buck and Humans, the relationship between Buck and other dogs, and the relationship between Buck and nature.
巴克和人类的关系，巴克和其它狗的关系，巴克和自然的关系都生动而深刻地阐述了适者生存这一生命法则。
Survival of the fittest is vividly and profoundly explained by the relationship between Buck and Humans, the relationship between Buck and other dogs, and the relationship between Buck and nature.
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