supererogatory
英 [,sjuːprə'rɒɡətɔːrɪ]
美 
- adj. 额外的,多余的;职责以外的
 
英文词源
- supererogatory (adj.)
 - 1590s, from Medieval Latin supererogatorius, from supererogat-, stem of supererogare "pay or do additionally" (see supererogation).
 
双语例句
- 1. It was supererogatory for her to gloat ( Mary McCarthy )
 - 她也在一旁幸灾乐祸地看得出神,真是多余 ( 玛丽麦卡锡 )
 
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- 2. It was supererogatory of her to gloat.
 - 她没必要幸灾乐祸.
 
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