他们几岁了？他们十岁了。
How old are they? They're ten years old.
youdao
他们几岁了？他一百岁了。
How old is he? He's one hundred years old.
他们俩都二十几岁了，都已结婚有了自己的孩子。
They're both in their twenties and both married with children of their own.
《柯林斯英汉双解大词典》
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