Her breathing became steady and she fell asleep.

她的呼吸变得均匀，便睡着了。

《牛津词典》

Jack's mother was so tired. She fell asleep as soon as she lay down on the bed.

杰克的母亲太累了。她一躺在床上就睡着了。

youdao

When we got there, my daughter pointed at the lights and shouted happily, "Dad, look!" And then she fell asleep.

当我们到达那里时，我的女儿指着灯光高兴地喊道：“爸爸，看！”之后她就睡着了。

youdao

She drank the liquid and immediately fell asleep.

VOA: special.2009.09.26

In the middle of the night, she fell asleep, still sitting in the chair by the window.

NEWYORKER: In Other Rooms, Other Wonders

On the 22 April, she fell asleep with her mother on the sofa.

BBC: NEWS | UK | Wales | North West Wales | Family's questions over 999 delay

On the ride home she fell asleep with her head against my shoulder.

NEWYORKER: Miracle Polish