they've reinvented themselves into a myriad of forms. 它们以无数种形态重塑自我
...evolving into the 18 different species we know today. 进化成 我们今天所知的18个不同的物种
to evolve into the deadliest predator since Tyrannosaurus rex. 进化成了 自霸王龙以来最致命的捕食者
Birds had turned from mere survivors into predators. 鸟类从幸存者变为捕食者
The greatest of them all, reaching over 100 meters into the air, 其中最大的 高度超过100米
but now started spinning their silk into complex webs... 但现在才开始 将蛛丝织成复杂的蜘蛛网