My best friend has been like a sister to me.
我最要好的`一个朋友待我亲如姐妹。
Is your sister older or younger than you?
你的姐妹比你大还是小？
She doesn't play as well as her sister.
她演奏得不如她姐姐。
My sister and I used to quarrel all the time.
我和妹妹过去老是吵架。
My sister came along just to give me some moral support.
我姐姐只是过来给我一些道义上的支持。
She's never really got on with her sister.
她从未与妹妹真正和睦相处过。
I'm going around to my sister's later.
我打算不久后到姐姐家去看看。
We have our differences, but she's still my sister.
我们之间虽然不和，但她仍旧是我的妹妹。
Her sister is a big girl, isn't she?
她姐姐是个大个子胖姑娘，是吗？