| 单词 | 冲积层 |
| 释义 | 〔alluvium〕Sediment deposited by flowing water, as in a riverbed, flood plain, or delta. Also called alluvion 冲积层：河床、洪水淹没的平原或三角洲中的流水淤积所产生的沉积层 也作 alluvion〔accretion〕Slow addition to land by deposition of water-borne sediment.冲积层：土地因水流所带的沉淀物冲积而扩大〔accretion〕An increase of land along the shores of a body of water, as by alluvial deposit.冲积层：如因冲积沉淀而使土地近水的地方扩大〔alluvial〕Of, relating to, or found in alluvium:冲积的；冲积层的：属于或在冲积层中发现的，与此相关的：〔gold〕Symbol Au A soft, yellow, corrosion-resistant element, the most malleable and ductile metal, occurring in veins and alluvial deposits and recovered by mining or by panning or sluicing. A good thermal and electrical conductor, gold is generally alloyed to increase its strength, and it is used as an international monetary standard, in jewelry, for decoration, and as a plated coating on a wide variety of electrical and mechanical components. Atomic number 79; atomic weight 196.967; melting point 1,063.0°C; boiling point 2,966.0°C; specific gravity 19.32; valence 1, 3. See table at element 符号 Au 黄金：一种软的，黄色的，抗腐蚀的物质，是最具有延展性的金属并能抽成丝，产于矿藏和冲积层中，通过开采或淘砂可以找到它，是热和电的良好导体。黄金中一般掺入其他物质以增加强度，经常被用作衡量国际货币的标准，也被制成珠宝作为装饰品，同时被广泛用作各种电子和机械元件的镀层材料。原子序数79；原子量196.967；熔点1,063.0°C；沸点2,966.0°C；比重19.32；化合价为1，3 参见 element |
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