First language
01
母语, 第一语言
the primary language that a person learns and uses fluently from early childhood
例子
His first language is Spanish, but he speaks English fluently as well.
他的母语是西班牙语，但他也能流利地说英语。
She grew up speaking Arabic as her first language.
她从小就说阿拉伯语作为她的第一语言。
