这就是他后娘生的两个女孩中的一个。

This is one of the two girls borne by his stepmother.

youdao

我认识两个女孩中的一个。

I don't know both of these two girls.

youdao

我的孩子就有一个，她们四个朋友的团体中的有感召力的女孩说服了其他人——在二年级——在课间孤立我女儿。

With one of my children, the powerful girl in their group of four friends convinced the others—in second grade—to ditch my daughter at recess.

youdao