在世界的部分地方，美洲虎与美洲豹通体都是黑色，这种适应色好像只在某些生活在各种不同的栖息地的动物身上出现。
In some parts of the world, jaguars and leopards are completely black, an adaptation that only seems to arise in species that live in a diverse range of habitats.
他们发现其中 18 匹马是枣色的，七匹是黑色的，而六匹马发生了遗传性变形，这被称作为 LP ，符合像美洲豹一样带有斑点的现代马。
They found that 18 of the horses were bay, seven were black, but six had a genetic variant—called LP—that corresponds to leopardlike spotting in modern horses.
应用推荐