... The Fourteen Years Old 十四岁 About Fourteen Years Ago 大约十四年前 But Fourteen Years Later 但十四年以后 ...
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The Hubble Space Telescope has helped expand our knowledge of the universe. It helped scientists estimate that the universe began about fourteen billion years ago.
哈勃望远镜帮助了我们扩大对宇宙的认识，还帮助科学家估计出宇宙始于大约140亿年前。
It helped scientists estimate that the universe began about fourteen billion years ago.
它帮助科学家估算宇宙大约开始于140亿年前。
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