The floor was covered with a white, powdery substance that turned out to be flour.地板上撒满的白色粉末状物质原来是面粉。What remains is a powdery deposit of carbon.剩下的是粉末状碳沉淀物。The detergent is available as a powder or a liquid.出售的清洁剂有粉末状和液态可供选择。The wind had stirred up a powdery red dust.风扬起一阵粉末状红色尘土。