形容词
中文翻译：有效的
同义词：
['efficacious', 'efficient', 'fruitful']
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 very effective for treating the common cold.
这种药对于治疗普通感冒非常有效。
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3. The manager's leadership style is highly effective in fostering teamwork.
经理的领导风格在促进团队合作方面非常有效。