| 单词 | 沉降 |
| 释义 | 〔sink〕To subside or settle gradually, as a massive or weighty structure.退去：缓缓沉降或落下，例如庞大或沉重的构架〔stromatolite〕A widely distributed sedimentary structure consisting of laminated carbonate or silicate rocks, produced over geologic time by the trapping, binding, or precipitating of sediment by groups of microorganisms, primarily cyanobacteria.叠层：分布广泛的叠层结构，由碳酸盐和硅酸盐的岩石叠层组成，经过地理年代由微生物群，最初为藻青菌，沉淀物的分离，结合或沉降形成〔subside〕To sink to a lower or normal level.沉降：降到低一层次上或降到正常水平之下〔fallout〕The slow descent of minute particles of debris in the atmosphere following an explosion, especially the descent of radioactive debris after a nuclear explosion.放射性粒子的沉降：爆炸后放射性粒子通过大气缓慢下降，尤指核爆炸后放射性粒子的下降〔geosyncline〕An extensive, usually linear depression in the earth's crust.地槽：地壳中广泛的、通常是线形的沉降地 |
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