Soon Dorothy's eyes grew so heavy that she felt she had to sleep.

不一会儿，桃乐茜的眼皮变得沉重起来，她觉得自己必须要睡觉了。

youdao

She told the Lord that it was awful, she had to sleep in cold back alleys where there was no food and life was hard.

她告诉主说太可怕了，她必须睡在冰冷的后巷，那里没有食物，生活十分艰苦。

youdao

She had been unable to sleep for three days because of her 13-week-old son's crying.

由于她13周大的儿子的啼哭，她3天没睡着觉了。

《柯林斯英汉双解大词典》

He did remember that when Fran-cesca was very pregnant she had been able to sleep only sitting up in an armchair.

NEWYORKER: The Swan

The woman told police that after she had thought the suspect went to sleep in his own bed, she slept in a sleeping bag provided to her by the rally.

WSJ: ObamaCare's Heritage

She knew that she had little chance of getting back to sleep.

NEWYORKER: The Visitor