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1·His mother tongue was German and at school he learned French and English, but he felt his English was poor.

他的母语是德语，在学校学了法语和英语，但他觉得自己的英语很差。

2·Hoping to discover what language a child would speak if he heard no mother tongue, he told the nurses to keep silent.

他希望发现一个没有听到母语的孩子会说什么语言，他让护士们保持沉默。

3·In different countries around the globe, English is acquired as the mother tongue; in others it is used as a second language.

在世界各地的不同国家，英语作为母语被习得；在其他地方，它被用作第二语言。

4·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。

5·English is her mother tongue.

英语是她的母语。

6·How do we learn out mother tongue?

人们是如何学会母语的？

7·Maybe this is already her mother tongue.

也许这先前就是她的母语。

8·He wrote the article in his mother tongue.

他用母语写的文章。

9·People like to read in their mother tongue.

人们喜欢阅读他们的母语。

10·The mother tongue is Macedonian, a south Slavic language.

母语是马其顿语，一种南斯拉夫人的语言。