Otherwise, the medicines could lose their potency over time due to the development of resistance.
否则，随着时间推移，由于产生耐药性，这些药物可失去其效力。
The disease would always find a way to sneak out of any trap, whether through vectors adapting to a new ecology, or the development of resistance to front-line medicines and insecticides.
无论是病媒通过适应新生态环境，还是对一线药物和杀虫剂产生耐药性，这种疾病将总是能够找到躲避各种伏击它的方法。
So it provides a potentially good alternative where there's been high development of resistance to pyrethroids.
所以，对那些已对菊酯类杀虫剂产生高抗药性的地区来说，就有了另一种选择。
To be effective, and to avoid the development of resistance in bacteria, prophylactic antibiotic therapy is used for only a short time.
抗生素预防用药只能短期应用，以达到药物疗效及避免细菌耐药性产生。
Research and development of new antibiotics isn't keeping up with development of resistance.
新抗生素的研究和开发赶不上耐药性的扩展。
The development of resistance to anticancer chemotherapeutic agents remains a large problem.
抗癌药物耐药性的发生仍是一大问题。
The development of resistance to anticancer chemotherapeutic agents remains a large problem.
抗癌药物耐药性的发生仍是一大问题。
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