My sister's expecting a baby.

我姐姐怀孕了。

《牛津词典》

My sister's coming to stay next week.

下星期我妹妹要来住几天。

《牛津词典》

She gave her sister's hair a sharp tug.

她猛地使劲扯了一下她姐姐的头发。

《牛津词典》

She's named after my sister-in-law." "Well I always liked the name Sebastian, so I wanted to name our older son Sebastian.

VOA: special.2009.07.06

You remember they're wandering around the forest without her picking berries. The younger brother, - the second brother, is most concerned about his sister's safety -- so I want you to look at this passage.

你们记得他们在树林中游荡,没有拿他们采摘的果子，小哥哥，也就是二哥哥，是最关心他妹妹安全的-,所以我想让你们看这篇文章。

耶鲁公开课 - 弥尔顿课程节选

I haven't seen it, but one of my sister's favourite films. So yeah, I think, all these cultures,

我没有看过，但是它是我姐姐最喜欢的电影之一。所以，我认为，所有的这些文化，

国际城市，伦敦 - SpeakingMax英语口语达人

Ms Venables' brother, David Marjara, said he was devastated about the circumstances of his sister's death.

BBC: Health

Cyr said Palin abused the powers of her office to go after her sister's ex-husband.

NPR: Palin's Nomination Stirs Hometown Fans, Detractors

Karen added that she and her family forgave her sister's killers "as Gayle would have done".

BBC: Shot Gayle 'would forgive killer'