大约2.5亿年前,在地球历史上最严重的一系列大灭绝中,几乎所有的生命物种都消失了。
Roughly 250 million years ago, in the worst series of mass extinction in Earth's history, almost all species of life simply vanished.
一个物种一旦灭绝就永远消失了。
大多数无脊椎动物在一次(物种)灭绝浪潮中消失了。
Most invertebrate species disappeared during a wave of extinctions.
应用推荐