亿年前 meaning in English
billion years ago
Examples
- At some time more than five billion years ago the universe started .
在50亿年前的某个时候，宇宙开始形成。 - Yet oxygen gas did not begin to accumulate in the atmosphere until about 2 billion years ago .
但是大约在20亿年前，氧气才开始在大气层中积累。 - Our solar system was formed 4 . 6 billion years ago
我们的太阳系被形成了4 . 6十亿年前。 - The chrysanthemum stone was former 280 , 000 , 000 years ago
菊花石形成于距今约2 . 8亿年前。 - The supernovae exploded between 3 . 5 and 10 billion years ago
超新星爆炸时间在35 - 100亿年前。