spentadj.失效的；精疲力竭的动词spend的过去式和过去分词spent batteries废旧电池spent cartridge发射过的弹壳spent catalysts废催化剂spent tan press废鞣料压机spent potlining废槽衬spent fuel rods核乏燃料棒spent lubricant废润滑剂spent conviction[法] 失效的判决spent regenerant废再生剂spent extractant使用过的萃取剂