名词短语
中文翻译：睡眠者的数量
同义词：
['sleeper population', 'number of sleepers', 'number of sleepers']
例句：
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1.The research team has identified the pitch of sleepers in the area.
研究团队已经确定了该地区的睡眠者数量。
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2.The government is concerned about the rising number of sleepers in the country.
政府对该国睡眠者数量增加感到担忧。
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3. The increase in the number of sleepers has had a significant impact on the economy.
睡眠者数量的增加对经济产生了重大影响。