[jiě mèi]
（姐和妹） sisters
sister of the whole blood; full sister
同胞姐妹
half sister
異父[母]姐妹
the affection of elder and younger sisters
姐妹之情
The two sisters are as like as two peas.
這姐妹倆容貌極相像。
（兄弟姐妹） brothers and sisters
How many brothers and sisters do you have?
你們姐妹幾個?