They provide the only food and water to sustain the family. 嫩叶提供了这个家庭唯一的食物和水
Only the most powerful dragons win the right to mate. 只有最强壮的巨蜥 才有权交配
Female dragons come into season only once a year. 雌性巨蜥一年发一次情
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
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
There are only a few hundred pygmy sloths in existence. 这座岛上只有几百只雌性侏三指树懒
As we explore them, so we gain not only understanding, but power. 当我们探索奇迹的时候 我们所谋取的不仅仅是去了解它,而是征服
They will only use just enough energy to make their kill 它们只用恰到好处的力量来猎杀
but their trials have only just begun. 不过小海龟的试炼才刚刚开始
They come from all over the Atlantic to this, their only colony. 它们从大西洋各处飞来,全部聚居在这个岛上