If you describe something as devastating, you are emphasizing that it is very harmful or damaging.
Affairs do have a devastating effect on marriages.
外遇着实对婚姻有极具破坏性的影响。
You can use devastating to emphasize that something is very shocking, upsetting, or terrible.
The diagnosis was devastating. She had cancer.
诊断结果令人震惊。她得了癌症。
You can use devastating to emphasize that something or someone is very impressive.
He returned to his best with a devastating display of galloping and jumping.
他骑马飞驰和跳跃的精彩展示,说明他恢复到了最佳状态。