first language 和 native language 的区别?
first language 和 native language 的区别?
native language 和mother tongue的区别是什么?
native language 和mother tongue有什么区别吗?
mother language与native language有什么区别?英语
language和tongue的区别
native language=?
second language和foreign language 的区别?我能不能理解为second language就
official language=native language么
请问native language,official language,second language,foreign
mother tongue 和 mother language 的 区别
what language 和 waht languages的区别
learning language 和learn the language的区别,个在什么情况下用