侄女

He adopts his niece as his heiress.

他指定他女为继承人。

My mother's nieces are my cousins.

我母女是我表妹。

"I'm considering to buy my niece a Christmas present, either a dictionary or an encyclopedia."

"我在考虑给我女买一样圣诞礼物,不是词典就是百科书。"

Her niece, an extremely voluble young woman,engages in soliloquies, not conversations.

她女是一个极其善谈、说起话来滔滔不绝年轻妇人，她总是在，不是对话。