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
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