used as the subject of a verb to refer to a woman, girl, or female animal that has already been mentioned

I asked my mother if she'd lend me some money, but she said no. 我问母亲能否借我点钱，她没有答应。

used instead of "it" to refer to a country, ship, or vehicle

After India became independent, she chose to be a member of the Commonwealth. 印度独立后，自主选择成为英联邦的成员。

Look at my new car - isn't she beautiful? 看看我的新车——是不是很漂亮？

a female

Is this kitten a she or a he? 这只小猫是母的还是公的？

female

a she-wolf 一头母狼

An enormous she-bear was hiding there, ready to pounce. 一头巨大的母熊躲在那里，随时准备扑过来。