| 单词 | alluvium |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔alluvial fan〕A fan-shaped accumulation of alluvium deposited at the mouth of a ravine or at the juncture of a tributary stream with the main stream.冲积扇：指储藏在峡谷山口或在支流与干流交汇处的扇形沉积物美国传统〔alluvion〕Law The increasing of land area along a shore by deposited alluvium or by the recession of water.【法律】 新生地：由于沉积或河水退落而使河岸的土地增加的现象美国传统〔pediment〕Geology A broad, gently sloping rock surface at the base of a steeper slope, often covered with alluvium, formed primarily by erosion.【地质学】 山前侵蚀平原，麓原：一种由侵蚀引起的在另一陡的倾斜底面上的宽而缓缓倾斜的岩石层面，其上通常覆盖着冲积土美国传统 |
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