名词
中文翻译：空闲数字
同义词：
['idle unit', 'idle number例句：1. The company has a large idle number of employees.（该公司拥有大量的闲置员工。）2. The idle number is used to calculate the efficiency of the system.（闲置号码用于计算系统的效率。）']
例句：
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1. The company has a large idle number of employees.
该公司拥有大量的闲置员工。
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2. The idle number is used to calculate the efficiency of the system.
闲置号码用于计算系统的效率。
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3. The idle number can be used to track the usage of resources.
闲置号码可以用来追踪资源的使用情况。