melt something ↔ down phrasal verbphr v LIQUIDto heat a metal object until it becomes a liquid, especially so that you can use the metal again 熔化〔金属物件以便再利用〕 A lot of the gold was melted down and used for making jewellery. 大量黄金被熔化后用来制作首饰。
melt down• As if anyone could melt them down.• Tony asks him whether he dug a hole, but he says no need, the stuff just melts its way down.• Back home, he melted them down and added ground - up coloured chalk - if available - to make crayons.
→ melt something ↔ down at melt(4)