牛奶变坏了 自从他参军以来已经五年了 钢笔是用来写字的 翻译

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牛奶变坏了 The milk has gone off.
自从他参军以来已经五年了
It has been five years since he joined the army.
钢笔是用来写字的
Pens are used to write.
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供参考答案1:
要翻译成语言