形容词
中文翻译：有效的
同义词：
['efficient', 'productive', 'efficient', 'effective', 'efficacious', 'potent']
例句：
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1. The new policy is 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 medicine is effective for treating the common cold.
这种药对治疗普通感冒有效。
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3. The manager's suggestions were effective in improving the company's productivity.
经理的建议在提高公司生产力方面是有效的。