that is still very much with us today. 这种创新今天仍然存在
these youngsters must eat as much as they can as fast as possible... 这些幼龙必须 尽可能能快地吃下尽可能多的食物
This Allosaurus is looking for much easier prey. 这只异特龙在寻找更容易对付的猎物
They have a much more efficient breathing system 它们拥有一种更高效的呼吸系统
The youngsters start life much like other reptiles. 幼崽开始生活 与其他爬行动物非常相似
As the plesiosaur can only eat so much, 因为蛇颈龙食量有限
it was much larger reptiles who would change the course of history. 即将改变历史进程的 是更大的爬行动物
And while it may not look like much, 虽然看起来并不起眼
plankton produced so much oxygen that it transformed our planet. 浮游生物产生了大量氧气 使我们的星球发生了巨大改变
much of our world was fiercely inhospitable... 我们世界的许多地方 都极不适宜生存