名词
中文翻译：替换
同义词：
['replacement', 'substitution']
例句：
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1.The new policy will replace the old one entirely.
新政策将完全取代旧政策。
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2.The replacement of the old system with a new one is necessary.
用新的系统取代旧的系统是必要的。
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3. The company has made a significant substitution in its marketing strategy.
该公司在其营销策略上做出了重大的替换。