...reptiles have had to adapt to an ever more crowded world. 爬行动物 不得不适应一个越来越拥挤的世界
This pup was born into a crowded world. 这只幼仔出生在一个拥挤的世界
This crowded world is so full of invention 这个拥挤的世界充满了创造力
Soon the island is crowded with birds. 很快岛上会到处都是鸟
They seem much more at home in the skies, than in a crowded colony on land 相对于地上拥挤的巢穴, 在天上飞就悠然自得多了
But first they must cross a crowded beach, 不过首先它们要通过拥挤的海滩
to find a crowded bustling colony of seabirds 看上去不象是能有大量海鸟筑巢的地方
but every year some of the world's high rivers are crowded by millions of visitors. 而世界上的高山河流每年都将 迎接成千上万的来访者