Prissy, looking up, saw her and her mouth opened to yell.

这时百里茜也抬头看见了她，她正要张嘴叫她。

youdao

The crow, pleased with the flattery, and chuckling to think how she would surprise the fox with her caw, opened her mouth.

乌鸦听了甜言蜜语很高兴，一想到自己的叫声会使狐狸大吃一惊，就咯咯地笑起来，张开了嘴。

youdao

She opened her mouth to say something.

她张开嘴要说什么。

《牛津词典》

When Tiamat opened her mouth to consume him, He drove in the Evil Wind that she closes not her lips.

当Tiamat张开大口想要毁灭他的时候，他操纵邪风，使她没办法合上嘴唇。

耶鲁公开课 - 旧约导论课程节选

Before long, the girl had swung around to my seat to demonstrate her double-jointed elbows and thumbs as well as a disturbingly loud clack in her jaw when she opened her mouth full bore.

CNN: Stranger's unexpected generosity makes a big impression

She opened her mouth to protest, then thought better of it.

NEWYORKER: Pumpkin Head

The only time my mother opened her mouth on the drive home was to ask Nnamabia if he wanted us to stop and buy some okpa.

NEWYORKER: Cell One