Definition
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adult
An adult is a person who is fully grown and developed, typically considered to be 18 years or older.
成人是一个完全成熟和发展的个人,通常被认为是18岁或以上。
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As an adult, he has to take responsibility for his actions.
作为一个成人,他必须对自己的行为负责。
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Many adults prefer to spend their weekends relaxing at home.
许多成年人更喜欢在家里放松度过周末。
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The movie is rated for adults only due to its content.
由于内容原因,这部电影仅限成年人观看。