supererogatory的音标：supererogatory的英式发音音标为：[ˌsu:pərə'rɒgətərɪ]supererogatory的美式发音音标为：[ˌsupərə'rɒgəˌtoʊrɪ]...

adj.额外的，超出职务的...

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 )It was supererogatory of her to gloat.她没必要幸灾乐祸....