effective in在 ... 方面有效的effectiveadj.有效的；生效的；实际的effective index method有效折射率法effective plate number有效塔板数effective instructions有效指导effectiveness analysis效能分析effective stressmethod有效应力法effective tax planning有效税收筹划effective contact rate有效接触率effective in treatment疗效显著effective lane-width车道有效宽度effective media theory等效介质理论