可以组成单词sleep，意思是睡觉，例如：

1、I sleep with the window open unless it's really cold.天气若不很冷，我总开着窗户睡觉。

2、He works at night and sleeps during the day.他晚上干活，白天睡觉。

3、How long can a human being go without sleep?人不睡觉能活多久