趣英语 / 查找:” [共找到152条结果]
  • “联”造句

    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...
  • 甲基”造句

    发现在酸性低粘度醇类溶剂中,五甲氧基三苯甲基正离子的褪色现象.It was observed that the pentamethoxyl red was fading in atidity and viscose alcohol.目的探讨西替利嗪的中间体1-犤 ( 4- 氯苯基 ) 苯甲基 犦 - 哌嗪的合成方法的改进.Objective To study improved synthetic method of 1 - [ ( 4 ...