名词
中文翻译：保留率
同义词：
['retention rate', 'retention fraction']
例句：
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1. Thecompany's retention rate is declining due to poor management.
由于管理不善，该公司的留存率正在下降。
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2. Theretention rate of the new product has exceeded expectations.
新产品的留存率超出了预期。
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3.The retention rate of the database was highdue to its user-friendly interface.
数据库的留存率之所以高，是因为其用户友好的界面。