first language
US /ˈfɜrst ˈlæŋɡwɪdʒ/
UK /ˈfɜːst ˈlæŋɡwɪdʒ/
名詞
第一語言, 母語
the language a person has learned from birth or the language a person identifies with as their primary language
範例:
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English is her first language, but she also speaks French fluently.
英語是她的第一語言，但她也能流利地說法語。
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Learning a second language is easier if you have a strong foundation in your first language.
如果你的第一語言基礎紮實，學習第二語言會更容易。