first language-
Italian is my first language .
意大利语是我的母语。
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His first language is Welsh .
他的母语是威尔士语。
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For 160,000 children , English is not their first language .
对于16万儿童来说，英语并不是他们的第一语言。
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English is not used as the first language in China .
在中国英语不是被用作第一语言。
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English is used as their first language .
英语被用作他们的第一语言。
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Analysis of the Roles of First Language in Second Language Acquisition ;
在第三语言习得和输出中第一第二语言的角色分析（英文）
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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。
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English is the first language in none of these countries .
英语在这些国家中都不是第一语言。
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Is First Language Acquisition an Obstacle to Second Language Learning ?
第一语言习得是第二语言学习的障碍吗？
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The children of the rich learn English as their first language .
富家孩子把英语作为第一语言。
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First language transfer research is an essential part in second language acquisition research .
母语迁移研究是二语习得理论研究中的重要内容。
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English is my first language but I also studied French in high school .
英语是我的第一语言，但我在高中还学了法语。
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Cognitive Interpretation of First Language Thinking in the College English Writing
大学英语写作中母语思维的认知理据
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Study of the Influences of First Language on English Writings
初探英语写作中母语的影响
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A General Comment on the Effect of Environmental Factors on First Language Acquisition
关于环境变量对儿童母语习得影响的研究
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Even if English isn 't your first language , these students need your help !
即使你的母语不是英语，也可以用你的热情和爱心帮助孩子们！他们需要你！
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Disparities Between Learning of First Language and Acquisition of Second Language
第一语言和第二语言习得过程中的差异
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French is spoken as the first language in this country .
在这个国家法语被当作第一语言来说。
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Most people speak English as a first language in the USA.
在美国，大多数人把英语作为第一语言（主动语态）。
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Children 's First Language Acquisition and Cultivation of Chinese Sense for the Foreign Students
儿童母语习得与留学生汉语语感培养
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French did not replace English as the first language .
法语却没有取代英语而成为英国的第一语言。
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Certainly there is no big difference between using my first language and using English .
当然，用英语还是用母语对我而言没有太大区别。
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Mother tongue refers to the first language for a person .
母语迁移指的是一个人的第一语言。
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Markedness Differential Hypothesis and First Language Transfer : An Empirical Study
标记区分假设与母语迁移：一项实证研究
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The teaching of Chinese as a first language and the students'command of their mother tongue
语文教学与语言文字应用
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To what extent does the learners ' first language influence their English writing ?
学生的母语对其写作影响程度如何？
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His first language is English , but he speak several other languages very well .
他的母语是英语，但他会说好几门外语。
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People know that English is not your first language , and most are happy to help .
他们明白英语不是你的母语，而且他们会很乐于提供帮助。
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A healthy human baby can usually speak his first language by this age .
健康的人类婴儿通常在这一年龄段会说母语。
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An Experimental Study on French Students ' First Language Transfer in Chinese Vowels-Acquisition
法国学生汉语元音学习中母语迁移的实验研究