While learning a second language, students should also enhance their awareness of the importance of mastering their mother tongue.

在学习第二语言的同时，学生也应该更加重视掌握母语的重要性。

English is her mother tongue.

英语是她的母语。

How do we learn out mother tongue?

人们是如何学会母语的？

Maybe this is already her mother tongue.

也许这先前就是她的母语。

He wrote the article in his mother tongue.

他用母语写的文章。