the lions must travel great distances to find enough to live on. 狮子也必须长途跋涉 寻找生存所需的食物

257. And there's an added problem -
     这里还有另一个问题
258. their food is always on the move.
     它们的食物总是在移动
259. Like the elephants,
     和大象一样
260. the lions must travel great distances to find enough to live on.
     狮子也必须长途跋涉 寻找生存所需的食物
261. But lions can't go everywhere -
     可是狮子并不是什么地方都能去的
262. they won't attempt to cross this field of sand dunes
     它们不会试着爬过一座沙丘
263. and the oryx know it.
     长角羚很清楚这一点

来自《行星地球 第一季 第五集 Planet Earth S01E05 沙漠》第 260 行