名词
中文翻译：圆粒沙
同义词：
['round sand', 'round grain例句：1. The beach is covered in round grain sand.（海滩上铺满了圆粒沙。）']
例句：
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1. The beach is covered in round grain sand.
海滩上铺满了圆粒沙。
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2.Round grain sand is a popular material for building sandcastles.
圆粒沙是建造沙堡的流行材料。
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3.The round grain sand was used to fill the hole in the wall.
圆粒沙被用来填充墙上的洞。