supererogatory

supererogatory

adj

more than is needed, desired, or required: trying to lose excess weight; found some extra change lying on the dresser; yet another book on heraldry might be thought redundant; skills made redundant by technological advance; sleeping in the spare room; supernumerary ornamentation; it was supererogatory of her to gloat; delete superfluous (or unnecessary) words; extra ribs as well as other supernumerary internal parts; surplus cheese distributed to the needy; Synonym: excess extra redundant spare superfluous supernumerary surplus

数据来源：WordNet

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）
2

Any higher standard of care that the researchers or sponsors are able to provide is supererogatory : that is , morally praiseworthy , but not obligatory .

这样，研究者和试验发起人给予的任何更高层次的关心都是额外的：也就是说，在道德上值得称颂，但并不是义务的。