with their speed and agility... 凭借其速度和敏捷度

351. restricted to feeding on low-energy kelp...
     只能以低能量的海藻为食
352. at the whim of the currents.
     还要看洋流的脸色
353. The warm-blooded penguins couldn't be more different...
     温血的企鹅则完全不同
354. with their speed and agility...
     凭借其速度和敏捷度
355. chasing down fish with ease.
     能够轻松地追捕鱼类
356. Underwater flight
     水下飞行
357. allowed the penguins to exploit the seas like never before.
     使企鹅能够 以前所未有的方法利用海洋

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 354 行