形容词
中文翻译：有效的
同义词：
['efficient', 'effective', 'efficient', 'productive']
例句：
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1. Thenew policy is expected to be effective in improving the quality of life.
新政策预计将有效提高生活质量。
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2. The 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.
经理的决定立即生效。