Oceanic and atmospheric flows are typical time-dependent vector fields, which belong to nonlinear dynamical system.
大气和海洋中的流场是典型的时变向量场，属于非线性动力系统。
Vector control is highly dependent on the use of pyrethroids, which are the only class of insecticides used on currently recommended ITNs or LLINs.
病媒控制在很大程度上依赖对拟除虫菊酯(用于杀虫剂)的使用，这是用于目前推荐的经杀虫剂处理过的蚊帐或经长效杀虫剂处理过的蚊帐的唯一杀虫剂类别。
Modern vector control for malaria is exceptionally dependent on a single class of molecule, the pyrethroids.
现代的疟疾病媒控制特别依赖于单一化学分子，即除虫菊酯。
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