dreg,dregs,dross,foots;scum,sediment是什么意思

用法例句

The Zhazixi W-Sb deposit, located in the middle part of Xuefengshan arc tectonic zone, is one of typical vein-filled hydrothermal deposits in China.

渣滓溪钨锑矿床位于湘西雪峰山弧形构造带的中段,是我国典型的脉状充填型锑矿床。