- 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 - comes from others of their own kind,
天敌就是他们的同类 - And there are some 2,000 of them here.
而这座岛上有约两千只巨蜥 - This giant however, isn't looking for food.
然而这只巨蜥 并不是在寻找食物 - he's looking for a mate.
他在寻找配偶 - Female dragons come into season only once a year.
雌性巨蜥一年发一次情 - She's receptive.
这一只并不排斥