effective
单词辨析：
指有效用的或能产生预期效果的。
The government took effective measures to reduce the price.
政府采取了有效措施来降低物价。
The talks between both sides were effective in settling their disputes.
双方会谈有效地解决了彼此间的纠纷。
指产生希望或想要的结果的，只用于事物，如举措、药物、对策等。
The government hasn't worked out the effectual measures to combat unemployment.
政府尚未找到应对失业的有效措施。
Quinine is an effectual preventive for malaria.
奎宁是预防疟疾的有效药物。
既可指人也可指事物，强调不浪费时间、金钱、能源等的。
She is an efficient secretary.
她是一位得力的秘书。
The diesel engine is highly efficient.
这台柴油机效率很高。
相关例句：
It would be unfair to suggest that he will be no more effective than his predecessors
暗示他不会比前任们更有作为是不公平的。
She said this would allow more effective planning.
她说这会为更有效的规划创造可能。
MDT is an effective treatment and could cure all the leprosy sufferers worldwide
联合化疗是一种有望治愈全世界所有麻风病患者的有效治疗方法。
When it is done properly, arts sponsorship can be more effective than advertising.
如果方式得当的话，艺术赞助可能比做广告更有效。
The Secretary General says the declaration must now be backed up by concrete and effective actions
秘书长说现在必须将宣言付诸具体有效的行动。
To link work at selected spots with that in entire areas is a very effective working method.
点面结合是一个很有效的工作方法。