- 1
Alluvial means made of the soil that rivers, lakes, and floods leave behind. Water carries tiny bits of earth, then drops them when it slows. The ground that forms is alluvial. Farmers often like alluvial plains because the soil is deep and rich. , , and news reports use the word for river valleys, deltas, and flood plains. It is a school-and-science word, not a word for mud on your shoes. The common use is the adjective: alluvial soil, alluvial gold, an alluvial fan. In technical writing it can also be a noun (“the alluvials of this basin”), naming that kind of deposit.
沖積的
組成From Latin alluvius (“alluvial”), from alluviō (“an overflowing”), from alluō (“wash against”). By the look of the English word: alluvium + -ial (“of or relating to”).
同家族的字
- alluviumthe noun for the soil itself; this adjective means “made of that soil”
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
alluvialadj/əˈluː.vi.əl/
- 1
Pertaining to the soil deposited by a stream.
- I am a working engineer from the Mount Magdalena district of Coolgardie. I don't want to take up your time with outside details so I will only say that about two years ago I had an opportunity of acquiring a share in a very promising claim—gold, you understand, both reef and alluvial.
- Soils are a prominent feature of floodplain environments, and we include them in this section because most of the available information on ancient soils pertains to alluvial examples, aside from those in Quaternary-Recent time.
alluvialnoun/əˈluː.vi.əl/
- 1
A deposition of sediment over a long period of time by a river; an alluvial layer.
- 2
Alluvial soil; specifically, in Australia, gold-bearing alluvial soil.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。