Crocodiles can slow their heart rate to just two beats a minute... 鳄鱼能够将心跳降至每分钟两次

250. To avoid detection, the crocodile silently submerges...
     为避免被发现 鳄鱼悄无声息地潜入水中
251. holding its breath
     屏住呼吸
252. for up to an hour.
     长达一小时
253. Crocodiles can slow their heart rate to just two beats a minute...
     鳄鱼能够将心跳降至每分钟两次
254. almost completely shutting down...
     接近完全停跳
255. in a way the reptiles perfected millions of years ago.
     爬行动物在数百万年前 将这种方法予以完善
256. Yet in the moment it launches its attack...
     它瞬间发动进攻

来自《我们星球上的生命 第一季 第四集 Life on Our Planet S01E04 冷血动物》第 253 行