| 词汇 | levee |
| 释义 | levee noun[ C ] uk /ˈlev.i/ us /ˈlev.i/ a wall made of soil or other materials that is built next to a river to stop the river from overflowing (= coming out of a place because it is too full)防洪堤（在河边由土等材料筑成的墙，以防止河水溢出） John Moore/Getty Images News/GettyImages Geography: banks & embankments bank bluff dune embankment hummock mound riverbank riverine riverside sandbank sandbar shoal snow bank terraced levee | American Dictionarylevee noun[ C ] us/ˈlev·i/ a wall made of land or other materials that is built to stop a river from overflowing (= flowing over its edges): Much of the city was under water after floods broke levees and forced the evacuation of 50,000 people. Examples of leveelevee The original levee en masse was a system of conscription enforced from above, but it was presented as a spontaneous expression of popular will. The terms embankments and levees are used interchangeably here. Trees with small crowns occur frequently in topographic depressions, whereas trees with extensive crowns dominate the levees. This may partly be because the pteridosperms were probably growing on the levees and other raised areas in the forest with clastic substrates. Within the same type of high or low levee, farmers' crop choice between plantain and manioc also involves risk-return calculations. Individual flows are typically blocky and have welldefined levees and flow fronts. The initial zone reflects mangrove associations on an expanding mudflat or low levee. It may also consist of the higher reaches of natural levees, terrain that normally does not flood. Throughout the lowlands, the levee has often been a prime location for settlement, gardens, and dryseason cropping. The levee sites are well-drained throughout the year whilst in contrast, the depressions are flooded in the rainy season. The inner fan consists of channel-fill, interchannel, levee and channel mouth bar deposits, representing the proximal part of the submarine fan. Once the channel was formed, the active lava continued moving downslope, leaving behind its levees as the magma supply decreased or ceased. Floodplain development policies, such as building levees, appear to offer these desired benefits. Sbl3 lava flow shows well-defined lateral levees, blocky surface and a flow front that widens after encountering a topographic barrier. These lavas were emplaced during the second effusive episode and are characterized by prominent levee structures and no material filling the flow interior in the upper and medial reaches. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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