It's only a year since I last saw the child and he's grown so tall.

这孩子一年不见，长这么高了。

《新英汉大辞典》

Their parents are so narcissistic, they can't see their child as an individual, only a reflection of themselves.

这些孩子的父母多半都很自恋，他们并没有把孩子当成单独的个体，而只是看作了他们自身的翻版。

youdao

How could he answer it to himself to rob his child, and his only child too, of so large a sum?

自己的孩子，而且是独生子，他怎么忍心剥夺他这么一大笔钱呀？

youdao

Amsterdam, Netherlands (CNN) -- The problem has become so complicated, that perhaps only a child can solve it.

CNN: Europe's pain is coming America's way

Chinese parents who can afford it want their only child to have a multilingual education so that they can compete in the global economy.

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Only one person could do so and they mentioned child benefit.

BBC: Why the row over cuts has started early