A single meal will last a dragon a month. 巨蜥一餐可以支撑一个月

57. to support such giants on this relatively small island.
    为这种庞然大物提供充足的食物来源
58. But reptiles, being cold-blooded,
    但冷血爬行动物只需要
59. need only about a tenth of the food a carnivorous mammal would.
    肉食性哺乳动物十分之一的食物量
60. A single meal will last a dragon a month.
    巨蜥一餐可以支撑一个月
61. They're so successful, that their only serious competition
    他们的生存之道如此成功 以至于唯一的
62. comes from others of their own kind,
    天敌就是他们的同类
63. And there are some 2,000 of them here.
    而这座岛上有约两千只巨蜥

来自《行星地球 第二季 第一集 Planet Earth S02E01 岛屿》第 60 行