corralling the shoal away from the open ocean and into the shallows. 将鱼群赶到远离开阔海洋的浅水区
glaciers hundreds of meters tall cascaded into the warming seas. 高达数百米的冰川 倾泻进入正在变暖的海洋
they've evolved into almost every size and shape. 进化出了各种大小和形状
all kinds of animals headed into the abyss. 各种动物都朝深渊前进
the planet was plunged into an ice age. 地球突然陷入冰河期
Rolling into a ball, it becomes completely impenetrable. 它卷成一团 变得无懈可击
because when cornered, the trilobite's armor comes into its own. 因为当被逼入绝境时 三叶虫的护甲就开始发挥作用
they were able to separate into layers of individuals, 但还是能够分离成数层个体层