overland trek made by any animal. 进行陆地上最伟大的长途跋涉

295. The caribou mothers now join together,
     母驯鹿现在聚集起来
296. each with an infant exactly the same age.
     每只都带着一只同样大小的幼鹿
297. They're setting off on the greatest
     她们准备启程
298. overland trek made by any animal.
     进行陆地上最伟大的长途跋涉
299. But wherever grass eaters travel,
     但是无论草食性动物走到哪里
300. predators lie in wait.
     都有捕食者等待着他们
301. Here they are, Arctic wolves.
     就是他们 北极狼

来自《行星地球 第二季 第五集 Planet Earth S02E05 草原》第 298 行