形容词
中文翻译：有效的
同义词：
['efficacious', 'efficient', 'effective', 'efficacious', 'efficient', 'effective']
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.This medicine is effective against the common cold.
这种药对普通感冒有效。
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3.The manager's decision was effective immediately after he made it.
经理的决定在宣布之后立即生效。