BYA：数十亿年前

英文缩写词BYA的例句

1. Scientists have analysed meteorites that formed billions of years ago before falling to Earth.
2. 科学家们是在分析检修了在数十亿年之前坠落到地球上的陨石之后得出这一发现的。
3. Billions of years ago the universe was too hot for life to exist.
4. 数十亿年前(BYA)，宇宙太热，不适合生命存在。
5. Billions of years ago, they say, something very large hit the earth.
6. 数亿年前，据说，一个庞然大物撞击了地球。
7. Such encounters between dwarf galaxies are normally seen billions of light-years away and therefore occurred billions of years ago.
8. 矮星系之间的如此遭遇通常发生在几十亿光年之外，也就是几十亿年之前。
9. Nearly all traces of the asteroids and comets that struck Earth billions of years ago have been erased from our planet's geologically active surface.
10. 在地球上，所有数十亿年前(BYA)被小行星和彗星撞击的痕迹，几乎都已经被地球表面的地质活动所抹去。