The dogs know their prey must come out or drown - 野狗们知道它们的猎物迟早会上岸 否则就会淹死

310. the impala has speed.
     而黑斑羚拥有速度
311. Leaping into the lake is an act of desperation -
     跳入湖中是绝望的选择
312. impala can barely swim.
     黑斑羚可不太会游泳
313. The dogs know their prey must come out or drown -
     野狗们知道它们的猎物迟早会上岸 否则就会淹死
314. now it's a waiting game.
     现在 它们只需等待
315. The rest of the pack are calling.
     狗群中的其它成员正在发出呼唤
316. They've made a kill in the forest
     它们已在树丛中捕到了一只猎物

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 313 行