n the offspring who came first in the order of birth
s first in order of birth
a. 最年长的, 排行中第一的
n. 最年长者, 排行中第一者
1. My eldest brother is studying in another country.
我的大哥在国外学习。
2. She is the eldest daughter in her family.
她是她家里的大女儿。
3. The eldest child often takes care of the younger ones.
老大通常会照顾弟弟妹妹。