persistence的形容词是什么

！persistence的形容词是persistent，adj. 执意的，坚持不懈的；持续的，反复出现的；（化学品，放射性）作用持久的，挥发慢的；（动植物某部位，如角、叶等）宿存的，不落的

The improvement in standards has been steady and persistent, but has attracted little comment from educationalists.