反义词

r.   consistently，systematically

参考例句

1. For ages, researches on Chinese textbook for vocational schools have been carried out slowly and unsystematically.
长期以来，中等职业学校语文教材的建设和研究工作进展缓慢，且缺乏系统性。

英英解释

adv.
  1. in an unsystematic manner