alluvial
의미: Relating to or composed of alluvium — fine sediment (clay, silt, sand, gravel) deposited by flowing water, especially on floodplains and river deltas.
Alluvial deposits create some of the most fertile agricultural land in the world, as rivers carry nutrient-rich soil from upstream areas and deposit it during floods. The Nile, Ganges, and Mississippi deltas are formed from alluvial sediment. In geology, alluvial fans are cone-shaped deposits formed where a fast-flowing stream enters a flat plain. Alluvial gold mining involves extracting gold particles from river sediments.
예문
- The rich alluvial soil of the river valley has supported farming communities for thousands of years. 这条河谷肥沃的冲积土已经养育了数千年的农耕社区。El fértil suelo aluvial del valle fluvial ha sustentado comunidades agrícolas durante miles de años.この河谷の肥沃な沖積土壌は、何千年にもわたって農耕社会を支えてきました。이 하곡의 비옥한 충적 토양은 수천 년 동안 농경 사회를 지탱해 왔습니다.
- Gold prospectors panned the alluvial deposits in the riverbed, searching for flakes washed down from the mountains. 淘金者在河床的冲积层中淘洗,寻找从山上冲下来的金片。Los buscadores de oro cribaban los depósitos aluviales del lecho del río en busca de pepitas arrastradas desde las montañas.金の探鉱者たちは河床の沖積堆積物をパンニングし、山から流されてきた金の薄片を探しました。금 탐광자들은 하상의 충적 퇴적물을 패닝하여 산에서 씻겨 내려온 금 조각을 찾았습니다.
- An alluvial fan spread across the valley floor where the mountain stream emerged from the narrow gorge. 在山间溪流从狭窄峡谷流出之处,一个冲积扇展开在谷底。Un abanico aluvial se extendía por el fondo del valle donde el torrente de montaña emergía del estrecho desfiladero.山の渓流が狭い峡谷から流れ出る場所に、沖積扇が谷底に広がっていました。산의 계류가 좁은 협곡에서 빠져나오는 곳에 충적선상지가 골짜기 바닥으로 펼쳐져 있었습니다.
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사용 가이드
맥락: academic
어조: neutral
기원과 역사
From Latin alluvius (washed against), from alluere (to wash against), combining ad- (to, against) and luere (to wash). The noun 'alluvium' entered English in the 17th century, with the adjective 'alluvial' following in the 18th century.
문화적 배경
Era: Modern
Generation: All ages
Social background: Universal
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