[mass noun]the performance of more work than duty requires 做职责以外的工作
常用词组 works of supererogation
(in the Roman Catholic Church) actions believed to form a reserve fund of merit that can be drawn on by prayer in favour of sinners (罗马天主教)赎罪行为,祈祷者为罪人行善赎罪
派生 supererogatory [-ɪˈrɒgət(ə)ri] adjective 语源
early 16th cent.: from late Latin supererogatio(n-), from supererogare 'pay in addition', from super- 'over' + erogare 'pay out'