形容词
中文翻译：有效的
同义词：
['practical', 'efficient', 'productive']
例句：
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1. The newpolicy is expected to be effective in reducing emissions.
预计新政策能有效减少排放。
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2.The manager's advice 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. This method is more effective than the previous one.
这种方法比之前的方法更有效。