名词
中文翻译：原始语言
同义词：
['native language', 'mother tongue', 'first language']
例句：
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1. The children are learning Mandarin as their source language.
孩子们正在学习普通话，作为他们的母语。
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2. She speaks English as her second language.
她英语是她的第二语言。
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3. Many people choose to learn Spanish as a source language for travel purposes.
许多人选择学习西班牙语作为旅行时的第一语言。