名词
中文翻译：砷斑
同义词：
['arsenosilicate stain', 'arsenic spot例句：1. The chemical was found on the surface of the soil sample.（这种化学物质在土壤样本的表面被发现。）']
例句：
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1. The chemical was found on the surface of the soil sample.
这种化学物质在土壤样本的表面被发现。
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2. The stain is due to the presence of arsenic in the water.
这种痕迹是由于水中存在砷造成的。
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3. The stain was caused by the spill of the acid solution.
这种痕迹是由酸性溶液的溢出引起的。