a.

1. 有益的，有利的
   The accident was a salutary lesson; I'll never drink and drive again.

   这一事故是一个有益的教训；我再也不酒后开车了。

2. 有益健康的，强身的

adj.

1. (of something unpleasant or unwelcome) beneficial in providing an opportunity for learning from experience.
2. archaic health-giving.