has now been taken a step further. 如今已经发展到了新高度

253. They're the only animals that can.
     只有它们有这个能力
254. No other here has such powerful bone-crushing jaws.
     其他动物的咬合力不足以咬断骨头
255. And this relationship between man and beast
     人类与野兽的这种关系
256. has now been taken a step further.
     如今已经发展到了新高度
257. Yousuf is calling the hyenas to his house.
     约瑟夫在呼唤鬣狗们去他家
258. He and his forefathers, going back five generations,
     他和他的祖辈 连续五代人
259. have been feeding the hyenas
     在喂食这些鬣狗时

来自《行星地球 第二季 第六集 Planet Earth S02E06 城市》第 256 行