billion years翻译
billion years的基本解释
读音: 美: 英:
十亿年：表示一段极长的时间，通常用于描述宇宙或地球的演化历程。
例句
The stars must have formed 10 to 15 billion years ago.这些恒星一定形成于100亿至150亿年前。《柯林斯英汉双解大词典》These rocks have been dated radiometrically at two billion years old.经辐射能探测，这些岩石形成于20亿年前。《牛津词典》
How could it be after four and a half billion years?怎么可能是在45亿年之后呢？
短语
billion years ago 亿年前About 265 billion years 约
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