A broad, low-lying, typically crescent-shaped mound of sandy or loamy matter that is formed by the wind, especially along the windward side of a lake basin.

眼镜堡一片广阔的、地势低的、典型的新月形沙堆或土堆，由风力形成，尤其是沿湖泊的顺风方向。

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The sandy materials mainly originate from modern fluvial action, dry lake deflation and older river courses.

沙质沉积物主要来源于现代流水作用、干涸湖泊和河流故道。

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On summer days, up to 8,000 sunbathes lounge on its sandy beach or cool off in the 10,000-square-meter (2.5-acre) lake.

在夏天，多达8000名日光浴休息者在沙滩或在10000平方米（2.5英亩）的湖里降温。

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"It's very dangerous, " says Sam Kabonge, a fisherman from the Bugala island in Lake Victoria, a tropical patch of land boasting sandy shores and lush forests.

CNN: Lethal weather on 'world's most dangerous lake'

Sturgeon Lake at the north end of the island has a sandy beach for swimming and it joins with the waterways of Steelman and Mud Lakes, making it an ideal spot for more experienced kayakers who are looking for a challenge.

BBC: Portland's urban adventures