谁知道mother tongue和first language的定义

mother tongue 和 mother language 的 区别 native language 和mother tongue的区别是什么? language和tongue的区别 native language 和mother tongue有什么区别吗? first language 和 native language 的区别? [英语专业的进] No language has ever been spoken by a mother-tongue 谁知道 target language and source language 的定义?帮帮忙 请问各位前辈,mother tongue 和 native speaker 的区别, The only language----is easy to learn is the mother tongue.A the only language that is easy to learn is the mother tongue 英语翻译The role of our mother tongue in second language learnin a mother tongue还是the mother tongue