堂姐妹

例句：

1. 1. My cousin is a great help to me.
   我的堂妹是我很大的帮助。
2. 2. She's the only sister-in-law I know.
   她是我唯一的堂姐。
3. 3. The couple has two children, one of whom is my cousin.
   这对夫妇有两个孩子，其中一个是我的堂妹。