In the absence of plants this food chain is based on a continuous supply of bat droppings. 在缺少植物的情况下 这里的食物链 完全依赖供应不断的蝙蝠粪便
allows some animals to gather there in huge numbers. 使得大批动物到此聚集
This is the biggest underground river passage in the world, 这是世界上最大的地下河通道
In Borneo, rain has sculptured the limestone into extremely sharp-sided pinnacles. 在婆罗洲 雨水已将石灰岩 雕凿成无比尖削的石塔
so although this rocky escarpment in the United States is now hundreds of metres above sea level 所以 尽管美国境内的这座石壁 如今矗立在海平面以上几百米高的地方
By ensnaring the insects that hatch in this cave, 通过诱捕洞穴内羽化的昆虫
Now it's just a matter of reeling in the line 现在 它只需收起丝线
taking place inside a special capsule in its tail. 由尾部的一个特殊腔囊产生
The silk comes from glands in the glow worm's mouth 丝产生自萤火虫口中的腺体