l1

Английский Язык - Английский Язык

Определение l1 в Английский Язык Английский Язык словарь

first Lagrange point, located further in twoards the primary of a system where a smaller object orbits a larger one, in front of the smaller object, inline with a line drawn through the centres of the larger and smaller objects

mother tongue (someone's native language)

Этимология

() From language 1, meaning "first language."