【BBC美丽中国】锦绣华南 17

英语自学网

This tranquil world is home to specialised cave fishes, like the eyeless Golden Barb. China may have more unique kinds of cave evolved fishes than anywhere else on earth. Above the water table, ancient caverns abandoned by the river slowly fill up with stalactites and stalagmites. Stalactites form as trickling water deposits tiny quantities of rock over hundreds or thousands of years. Stalagmites grow up where lime-laden drips hit the cave floor.这静谧的世界是穴居鱼的家，比如无目金鲃。中国或许拥有地球上种类最为繁多的洞穴进化鱼。在地下水位线，被河流遗弃的远古洞穴中充斥着石笋和钟乳石。含有沉积物的水流在千万年间“滴水成石”。含有石灰质的水滴落石床形成石笋。