报废 announce invalidated check in paper; be declared worthless; discard as useless; dumping; scrap; report as unserviceable [useless]: 这架机器太旧, 快报废了。 this machine is so old that it will soon have to be scrapped.◇报废尺寸界线 condemning limit; 报废等值线 abandonment contour; abandonment; 报废巷道 [矿物学] abandoned workings; 报废件 discard; 报废零件 faulty part; scrapped parts