er音标: [ə]
n. 姐妹（称志同道合者）姐妹修女护士
adj. 姐妹般的同类型的
I like apples， but my sister likes bananas.
我喜欢苹果，但是我的姐妹喜欢香蕉。
And how is my sainted sister?
我那大好人姐姐怎么样
His sister Sarah helped him.
他姐姐萨拉帮助了他。
My other sister is a doctor.
我的另一个妹妹是医生。
I was at school with her sister.
我和她妹妹过去在一个学校读书。
