素养 = 平日修养(现代汉语词典)

素养 = accomplishment; attainment eg 艺术素养 artistic accomplishment
修养 = accomplishment; training; mastery eg 有艺术修养 be artistically accomplished
(外研社:汉英词典)

accomplished = good at something 擅长于...的;有造诣的 eg an accomplished singer 有造诣的演唱家
accomplishment = a skill 才艺 eg Being able to play the piano well is just one of his accomplishments. 钢琴弹得好仅仅是他的其中一种才艺.
(朗文进阶词典)

attainments = (UK formal) Someone's attainments are the things they have done and the skills they have learned.

accomplished = skilled eg She's a very accomplished pianist/painter/horsewoman. He was accomplished in all the arts.
accomplishment = a skill eg Cordon-bleu cookery is just one of her many accomplishments.
(Cambridge Advanced Learner's Dictionary)