1、经受磨练
...mill wheel n.水车；水车之轮go through the mill v.经受磨练in the mill adv.在制造中 ...
2、历尽艰辛
... go through 完成，通过 go through the mill 经受严格训练(或磨练)；历尽艰辛 go through with 把…进行到底；完成，实行(计划等) ...
3、经受严格训练
... go through 完成，通过 go through the mill 经受严格训练(或磨练)；历尽艰辛 go through with 把…进行到底；完成，实行(计划等) ...