英汉例句双语例句In case of fire, the meltdown first occurs in metal welded at low melting points and the decorative slice drops off.当火灾发生时，装饰片与支架之间的低熔点焊接金属首先熔化，装饰片脱落。metal meltdown更多例句词组短语短语contact metal meltdown 触头熔焊metal meltdown更多词组