金矿并非无底的宝藏，金子终究会被采光。A gold mine is not a bottomless pit, the gold runs out.这个小伙子穿着橡胶底的鞋子。The lad was wearing rubber-soled shoes.将鲑鱼放在不粘底的金属盘内。Place the salmon in a nonstick metallic dish....