Using the weight of his giant head, 它利用自己巨大头部的重量

272. The hunt is on.
     捕猎开始
273. Able to rapidly accelerate to 50 kilometers an hour...
     它能够很快加速到每小时50公里
274. he's picked out a youngster trailing behind.
     它选择了一只落在后面的幼崽
275. Using the weight of his giant head,
     它利用自己巨大头部的重量
276. he's a master at changing direction.
     非常善于变向
277. Time to deliver the final blow.
     最后一击的时间到了
278. The savage terror birds now dominated the plains of South America.
     野蛮的骇鸟统治着南美洲的平原

来自《我们星球上的生命 第一季 第六集 Life on Our Planet S01E06 灰烬中重生》第 275 行