spentadj.失效的；精疲力竭的动词spend的过去式和过去分词spent sawdust litter猪粪木糠spent bleaching earth废白土spent solder stripper废退锡液spent nickel catalyst废镍催化剂spent brewer rs grain酒糟spent etching solution废蚀刻液spent reactivation gas废再生气spent mushroom compost蘑菇渣spent auto-catalysts失效汽车催化剂spent Li-ion battery废旧锂离子电池