firstborn deer仔马鹿
Fangren Firstborn先驱方壬
Firstborn Light首生的亮光
Firstborn Games运营公司
firstborn piglet初生仔猪
firstborn fiber初生纤维
firstborn daughter长女
Tower Of Firstborn长子之塔
N-SING（单数型名词） Someone's firstborn is their first child. 头生子女 [oft N n]
She was my firstborn.
她是我的长女。