形容词
中文翻译：有效的
同义词：
['practical', 'efficient', 'productive例句：1. The new policy is expected to be effective in reducing pollution.（新政策预计将有效减少污染。）']
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 manager's decision was effective immediately after the meeting.
经理的决定在会议后立即生效。
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3.The new software is expected to be effective in improving efficiency.
预计新的软件将提高效率。