..beneath the surface. 潜藏于水面之下

46. Mugger crocodiles -
    沼泽鳄
47. giants, five metres long.
    长达五米的巨型鳄鱼
48. Dozens are hiding...
    十数只沼泽鳄
49. ..beneath the surface.
    潜藏于水面之下
50. And others...
    还有更多鳄鱼
51. ..are on their way.
    将来到此处
52. This male has been travelling for hours.
    这只雄性鳄鱼已经奔波了数小时

来自《行星地球 第三季 第四集 Planet Earth S03E04 淡水》第 49 行