the particles and flakes (and sometimes small nuggets) of gold obtained in placer mining
gold dust的用法和样例:
例句
用作名词 (n.)
Tibet plans to ban the mining of mercury, arsenic, peat and gold dust in the region to protect its ecological environment. 西藏计划取缔对汞,砷,泥煤,砂金在其区域的开采,以保护环境。