Some of the guns were melted down and used to help build a statue. [be VERB-ed PREP.]

一些枪炮被回炉后用来建造了一座雕像。

When Jefferson didn't like a pair of goblets given to him as a gift, he asked a local smith to melt them down. [VERB noun PREP.]

杰斐逊不喜欢别人作为礼物送给他的一对高脚杯，就请当地的一个工匠把酒杯熔毁了。

Some thieves do not even bother to melt down stolen silver for its scrap value. [VERB PREP. noun]

有的小偷懒得为了一点蝇头小利去费劲把偷来的银器熔掉。