名词
中文翻译：硅土
同义词：
['silica', 'silicon dioxide例句：1. The silundum was used as a building material in ancient times.（硅土在古代被用作建筑材料。）']
例句：
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1. The silundum was used as a building material in ancient times.
硅土在古代被用作建筑材料。
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2.The silundum has been found in many places around the world.
硅土在世界许多地方都有发现。
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3. The silundum is a non-metallic mineral that is used in various industries.
硅土是一种非金属矿物，被用于各种工业中。