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| sand flat A sandy tidal flat barren of vegetation. A tidal flat is an extensive, nearly horizontal, marshy or barren tract of land that is alternately covered and uncovered by the tide, and consisting of unconsolidated sediment (mostly mud and sand). It may form the top surface of a deltaic deposit (没有植物的沙的潮汐滩地。潮汐滩地广阔的、几乎水平的、沼泽或贫瘠的土地，它间歇的被潮汐覆盖，由疏松的沉积物组成(主要是泥土和沙)。它可以构成三角洲沉积的表面。) | |||
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| 沙坪: 1 phrase in 1 subject |
| Technology | 1 |