This is the 4252nd most frequent Chinese word.
姊妹
Sisters.
In this sentence, '姊妹' is used to specifically refer to biological sisters, indicating a sibling relationship.
她有两个姊妹，一个是老师，另一个是医生。
She has two sisters, one is a teacher, and the other is a doctor.
Here, '姊妹' can imply a general term for women who share a sisterly bond, not necessarily biological.
这是一所帮助姊妹们教育的学校。
This is a school that helps sisters with education.
In this case, '姊妹' is used metaphorically to describe a supportive and caring relationship, akin to that between sisters.