形容词
中文翻译：有效的
同义词：
['efficient', 'productive', 'efficient', 'fruitful']
例句：
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1. The new policyis expected to be effective in reducing pollution.
新政策预计将有效减少污染。
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2. The manager's suggestion was very effective in solving the problem.
经理的建议非常有效地解决了这个问题。
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3. Her advice was extremely effective in helping me to improve my grades.
她的建议在我提高成绩方面极其有效。