but life ahead will be challenging, 但前方的生存之路仍充满荆棘

337. they will be reunited through the messages they leave
     他们会通过在岩石上留下的信息
338. on the marking rocks.
     间接地团聚
339. Her mother has succeeded in raising her,
     幼崽虽被母亲成功养大
340. but life ahead will be challenging,
     但前方的生存之路仍充满荆棘
341. and she will spend nearly all of it alone.
     而她几乎全部要独自面对
342. Only the toughest can survive
     只有最顽强的动物
343. among the savage beauty
     才能在世界最高屋脊上

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 340 行