salutary
词根词缀：
salubrious adj. 健康的，有益健康的
salubr〔= salu〕健康 + ious 有…性质的，关于…的 → 健康的，有益健康的
salutary adj. 有益的，有益健康的
salu 健康 + tary → 有益的，有益健康的
salutary adj. （对身心）有益的
salut〔= salv〕救助 + ary 物 → 救助〔身体〕的 → 有益的
salvage n. 抢救
salv 救助 + age 表行为 → 救助行为 → 抢救
salvation n. 救助
salv 救助 + ation 行为，过程，状态，结果 → 救助
salve n. 药膏
salv 救助 + e → 解救伤痛 → 药膏
salve v. 减轻
save v. 挽救
saviour n. 救星
sav 救助 + iour → 救助别人的人 → 救星
数据来源：新东方英语词汇速记大全
相关例句：
It is salutary to consider that perhaps in future we wilt not have such easy access to coal and petrol.
将来我们也许无法这么容易得到煤和汽油，现在就考虑到这一点有好处。
After the salutary experiences of Iraq and Afghanistan, would Mr Cameron join him in another Middle East war?
经过了伊拉克和阿富汗的教训，卡梅伦还会追随他参与另一场中东战争吗？
The first was a salutary reminder that infectious disease can hitch a plane ride anywhere.
第一个报告是个有益的提醒，说明传染病能够搭乘飞机四处传播。
But the chaos in Iraq and the defiance of North Korea and Iran have offered a salutary lesson that it cannot act alone.
但伊拉克的混乱局势及朝鲜和伊朗的公然挑战给美国上了有益的一课：它不能单干。
These salutary effects would probably remain even as higher-skilled tasks become candidates for trade.
即便更高技能的工作任务成为贸易候选品，这些正面效应仍可能会存在。
It is also salutary to note how quickly the shale revolution has overturned many predictions of ebbing US power.
另外有必要指出的是，页岩气革命是多么迅速地推翻了众多关于美国实力衰落的预言。