一曝十寒
一曝十寒一曝十寒[yī pù shí hán]1.■expose sth. to sunheat for one day and to cold for ten days; One scorch and ten colds.; play fast and loose; study [do] sth. for one day and put it aside for the next ten days; sun one day and rain ten days; work by fits and starts; work [labour] hard for one day and do nothing for ten
