spent

adj.

用过的；不再有用的；已废的；失效的

v.

用钱，花钱( spend的过去式和过去分词 )；花费；消耗；花（时间）

spent fuel乏燃料，用过的燃料

spent catalyst废催化剂；用过的催化剂

spent liquor废液

spent caustic废碱液

spent acid[化]废酸

1. He fired a shot, then ejected the spent cartridge.
   他开了一枪，然后倒出了用过的弹夹。
2. At the end of the hot day the spent workers slept under a shady tree.
   经过炎热的一天,筋疲力尽的工人们在树荫下睡着了。

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