多氯化联苯在土壤中, 水中或空气中都无法分解, 只会继续累积.PCBs don't break down in soils, water or air, but carry on accumulating.建立了HPLC测定联苯菊酯含量的方法.An HPLC method for the determination of bifenthrin emulsifiable concentrates was developed.介绍...
窗上的水结成了冰柱.The water formed into icicles on the window.冬天树枝上挂着冰柱.Icicles hang from tree braches in winter.她说,她的热情定会融化他心中的冰柱.She said passion should thaw the icicles in his heart....
A combination of operator mismanagement and design flaws caused the accident.事故归因于操作人员处置失当,也归因于设计方面的漏洞.Mismanagement and climate change are shrinking clean water supplies worldwide.管理不善(mismanagement)和气候变化正在逐步削弱全球干净水资源的供...