The jaguar is the third largest of the big cats, and pound for pound the most powerful. Our jaguar patrols a home range of over one hundred square kilometers in Brazil, deep in the heart of the world's largest tropical rainforest. But human interference means that his life only gets tougher.　　美洲豹是体型第三大的大型猫科动物，但就单位体重而言，它是最强壮的。我们的这只美洲豹在巴西活动，巡逻的领地超过一百平方公里，位于世界上最大的热带雨林深处。然而，人类的干预使得它的生活变得愈发艰难。