The class is sleeping all day.

全班学生整天都在睡觉。

youdao

She is sleeping soundly.

她睡得正香。

《新英汉大辞典》

She is sleeping with the mouth open.

她张着嘴睡觉。

youdao

He steals all the Christmas gifts and food in the village while everyone is sleeping.

VOA: special.2010.05.02

Dreams" is such a fun topic that I'm going to devote half a class to sleeping and dreams.

梦“是个很有意思的话题,我将会用半节课的时间来说说睡眠和梦。

耶鲁公开课 - 心理学导论课程节选

You remember, thalidomide is the drug which was actually really most used as sleeping aid that when pregnant women took were shown to produce deformities, children who were born without limbs for example.

你应该知道这种药品,实际上它是用来辅助睡眠的,但是，如果孕妇吃了这种药,就可能造成胎儿畸形，可能生出来的婴儿是没有四肢的。

普林斯顿公开课 - 人性课程节选

She is sleeping in a big double sleigh bed with her younger sister, who likes to sleep sideways.

FORBES: Last Year For Santa

"If (Juliet) is sleeping then I am allowed to spoil mom, " Brandon says.

CNN: I'm jealous of my baby -- a Mother's Day confession

"The bird doesn't actually hear his song when he is sleeping, because he is not producing any sound, " said Dr Deregnaucourt.

BBC: NEWS | Science/Nature | Sleep helps birds sing better