spentadj.失效的;精疲力竭的动词spend的过去式和过去分词
spent meal脱脂粉
spent acid废酸
spent fuel烧过的核燃料
spent oxide废氧化物,失效的海绵铁
spent acids乏酸
spent force过时的人
spent steam废汽
spent riser待生催化剂提升管
spent water废水
spent baths废液