daughter of the same parents as oneself or another person
"my sister married a musician"
"the Sisters taught her to love God"
"none of her sisters would betray her"
We are four children; there is my sister Diana and the three men.
出自： J. Cheever
误 Do your sister-in-laws get along with one another?
正 Do your sisters-in-law get along with one another?
误 Which nurse is in charge of the children's ward?
正 Which sister is in charge of the children's ward?
误 The orphanage is run by a group of sister.
正 The orphanage is run by a group of sisters.
析 “一批修女”可说a group of sisters, sister须用复数形式。