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这里有一段视频，全英文，希望你喜欢。看下面内容之前，请尽量先看完这段视频，然后你才不会觉得困惑。
What's your reaction when talking about a leopard? Blood, hunter, predator, big cat? I think the leopard deserves all the titles.
说起豹子，你有什么反应？血，猎人，捕食者，大猫？我认为豹子配得上所有的称号。
That's true, the leopard is the top predator. Over millions of years, leopards were wandering on all of the continents. However, because of the deteriorating environment, most areas where were their homes now no longer see them anymore.
没错，豹子是顶级捕食者。数百万年来，豹子在各大洲游荡。然而，由于环境的恶化，他们家所在的大部分地区现在已经看不到他们了。
India is one of the countries that give leopards enough protection. Even though, along with exploded population, the relationship becomes intense between this big cat and local people.
印度是给予豹子足够保护的国家之一。尽管如此，随着人口的爆炸式增长，这只大猫和当地人之间的关系变得更加紧张。
Every time, when villagers found leopards around it, they may be inclined to drive it away, or even kill it for the sake of safety. Leopards are in danger.
每次当村民发现豹子在它周围时，他们可能会倾向于将它赶走，甚至为了安全起见杀死它。豹子处于危险之中。
Curiously, this time, in the video, this leopard has a unique behavior than others. It has a nice mood for cattle and local people. Never have done anything wrong. It visits this village, especially a cow frequently, all its actions are recorded by the camera.
奇怪的是，这一次，在视频中，这只豹子有着比其他人更独特的行为。它对牛和当地人有很好的心情。从来没有做错什么。它经常来这个村子，尤其是一头牛，它的一举一动都被摄像机记录下来。
When a group of biologists learns this oddest story, they decide to look into more detail.
当一群生物学家了解到这个最奇怪的故事时，他们决定研究更多细节。
Unfortunately, before biologists take action, it visits the village last time, it might be a gesture to say goodby to this cow. And then disappear, never back again.
可惜，在生物学家出手之前，它上次拜访村子，或许是向这头牛告别的一种姿态。然后消失，再也不回来。
What forces cause it to visit this village frequently and without conducting any dangerous preys? Why it doesn't back again? This puzzle has been disturbing scientists for a while.
是什么力量让它频繁地造访这个村子，却没有猎杀任何危险的猎物？为什么它不回来了？这个谜题一直困扰着科学家们一段时间。