形容词
中文翻译：有效的
同义词：
['efficacious', 'efficient', 'fruitful例句：1. This new policy is expected to be effective in reducing pollution.（预计这项新政策能有效减少污染。）']
例句：
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1. This new policy is expected to be effective in reducing pollution.
预计这项新政策能有效减少污染。
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2.The teacher's advice was very effective in helping the student improve his grades.
老师的建议对学生提高成绩非常有效。
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3. Her suggestions were quite effective in solving the problem.
她的建议在解决问题上非常有效。