- It first evolved hundreds of millions of years ago,
最早在数亿年前进化 - but still exists today.
但如今依然存在 - It owes its success to the deep ocean's unchanging nature.
它的成功要归功于深海的稳定性 - Below 600 meters, the temperature rarely fluctuates,
在600米以下 温度几乎没有波动 - making it a sanctuary of stability.
使其成为稳定的避难所 - When the Ice Age struck,
当冰河时期袭来时 - all kinds of animals headed into the abyss.
各种动物都朝深渊前进