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1·Italian is my first language.

意大利语是我的母语。《牛津词典》

2·His first language is Welsh.

他的母语是威尔士语。《牛津词典》

3·English was his first language and he always had a terrific ear.

英语是他的第一语言，而且他的听力一直很好。

4·Try not to think in your first language and translate your ideas into English.

试着不要用你的母语去思考，把你的想法翻译成英语。

5·Today, I think I use English more than my first language.

如今，我用英语比用我的母语要多。

6·The children of the rich learn English as their first language.

富家孩子把英语作为第一语言。

7·In the late fourteenth century, English became the first language again.

在14世纪末，英语再次成为第一语言。

8·English isn't your first language but you speak and express yourself very well.

英语并不是你的第一语言，但是你却说得很好并且表达得很棒。

9·Imagine you can talk to native speakers just like you talk in your first language.

想象你可以与以英语为本土语言的人谈话就如同与别人说自己的母语一样。

10·Nepali is the national language with 47.8% of the population speaking it as their first language.

尼泊尔语是尼泊尔的国语，大约47.8%的人口将它作为第一种语言。

母语

1·His first language is Welsh.

他的母语是威尔士语。《牛津词典》

2·Italian is my first language.

意大利语是我的母语。《牛津词典》

3·Try not to think in your first language and translate your ideas into English.

试着不要用你的母语去思考，把你的想法翻译成英语。

4·The report also says that the New Orleans police routinely conduct illegal stops and searches, especially of blacks and those whose first language is not English.

该报告还指出，新奥尔良警察经常进行非法拦截和搜查，对黑人和那些母语不是英语的人更是如此。

5·Scores are recorded on the Test Report Form along with details of the candidate's nationality, first language, date of birth and id number.

成绩单上记录了考生各项的考试成绩，并写明了考生的国籍、母语，生日和身份证件号。