名词
中文翻译：未筛过的砾石
同义词：
['unfiltered gravel', 'unprocessed gravel']
例句：
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1.The road was paved with unscreened gravel.
这条路是用未经筛选的砾石铺成的。
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2.The construction crew used unscreened gravel to level the site.
建筑工人使用未经筛选的砾石来平整场地。
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3.The unscreened gravel was a hazard for pedestrians crossing the street.
未经筛选的砾石对过街的行人构成了危险。