They seem to form a cordon around the impala. 它们似乎打算对黑斑羚形成一个包围圈

293. An aerial viewpoint gives a new insight into their strategy.
     通过空中镜头 我们能从新的视角观察它们的战术
294. As the dogs approach their prey
     狗群一旦接近猎物
295. they peel off to take up separate positions around their target.
     便立刻分散 占领目标四周的各个位置
296. They seem to form a cordon around the impala.
     它们似乎打算对黑斑羚形成一个包围圈
297. Moving in total silence
     它们悄无声息地逼近
298. they take up their positions.
     然后各就各位
299. Those ears can detect the slightest rustle.
     它们的耳朵能洞悉最轻微的响声

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 296 行