For its size, it is one of the fastest sprinters on Earth. 就其体积而言 它是地球上最快的短跑运动员之一
Its design has been fine-tuned over millions of years. 它的设计经过了数百万年的精心调整
Each species has its own signature dance move 每个物种都有自己独特的舞蹈动作
how anything could ever make this hostile place its home. 任何生命 会在如此充满敌意的地方定居
the juvenile's jaws are not yet strong enough to break its shell. 幼鱼的颌尚不够强大 无法咬破它的壳
It can bite down and crush its prey. 它能咬住并咬碎猎物
But Dunkleosteus has a weapon its tiny ancestors did not. 但是邓氏鱼 拥有自己微小祖先所没有的武器
Even its young, barely half its size, are fearsome predators. 即便在幼年期 仅有一半大小 也是可怕的捕食者