搁浅在河中的沙洲是指狂妄、傲慢或贡高我慢。
Landing on a small island in the middle of the river means conceit, pride or haughtiness.
这种自然演替模式随着滩涂（或沙洲）淤积增高和面积的扩涨，即按高程从低到高的顺序进行。
This mode goes from low to high with the heighten of filling up and enlargement of sandbank (or tidal flat). 3.
当洪水消退 后，他们留下的地质特征在规模上完全是瓦格纳式的 宏篇巨制：砂砾和沉积物堆积的沙洲超过250米高；
When the waters receded, they revealed geological features that are positively Wagnerian in scale: bars of gravel and sediment heaped up more than 250 metres high;
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