- the effect can be deadly.
效果致命 - But mammals have acquired some extraordinary defenses...
但是哺乳动物与蛇的军备竞赛 已经开展超过一亿年 - having been locked in an arms race with snakes
在这个过程中 - for more than a hundred million years.
哺乳动物获得了非凡的防御能力 - The sidewinder snake.
侧进蛇 - It will wait for hours at a time for signs of passing heat.
它会等待经过的热痕迹 一等就是几个小时 - Heat that comes from small warm-blooded mammals.
来自小型温血哺乳动物身上的热痕迹