常見例句雙語例句Most caves are formed by limestone, a carbonate rock.大多數(shù)洞穴是由石灰?guī)r形成的,這是一種碳酸鹽巖。Widespread distributed pure carbonate rock is the basis on which stony desertification formed while relief and vegetation retrogression process can also promote desertification.廣泛分佈的純碳酸巖是形成石漠化的基礎(chǔ),地貌植被退化過程也可促進(jìn)石漠化。Usually, it happens when the substrate is formed by limestone, carbonate rock, salt beds or any other rock that is easily eroded by water streams.通常,它發(fā)生在基板是由石灰?guī)r,碳酸鹽巖,鹽層或任何其他巖石,很容易被水侵蝕形成的谿流。bbs.internet.org.cn原聲例句These cave systems form in carbonate rock, often on islands.權(quán)威例句The second sample is a piece of dolomite (a rock made of calcium magnesium carbonate).ECONOMIST: MeteoritesBeachrock: ledges of rock formed within the body of the beach consisting of sand grains cemented by calcium carbonate and formed by chemical processes.UNESCO: L O S S A R Y 返回 carbonate rock