Dross
01
废物, 无价值的东西
something of low quality or little value, often considered rubbish or worthless material
例子
She sifted through the dross of the old attic, hoping to find hidden treasures among the discarded items.
她筛选了旧阁楼的渣滓，希望在被丢弃的物品中找到隐藏的宝藏。
02
浮渣, 废料
the waste material that forms on the surface of molten metal during smelting or refining as a result of oxidation
例子
Workers skimmed the dross from the surface before pouring the metal into molds.
工人们在将金属倒入模具之前，从表面撇去了浮渣。
