effective at在 ... 效率高effectiveadj.有效的；生效的；实际的Effective conflict有效冲突effective net head有效净水头effective judgment生效判决effective fixative有效定香剂effective chlorine有效氯effective particle有效性粒子effective dot area有效网点面积率effective molarity有效(体积)摩尔浓度effective cleaning有效清洗effective humidity有效湿度