她用完一次性餐具后就直接扔掉了。

She used a ___throwaway utensil and then tossed it immediately.

他随口说的一句玩笑话让大家都很尴尬。

His ___throwaway joke made everyone feel awkward.

在那个残酷的游戏中，失败者被当作可有可无的弃子。

In that brutal game, the losers were treated as ___throwaways.