Change for change's sake is stupid and enervating.
为改变而改变是愚蠢而徒劳无功的。
After the operation she had been enervating for several hours.
手术后她已经虚弱几个小时了。
Those were miserable, enervating months - all of which I spent stuck inside my mother's house.
我腻在我妈妈家里的那几个月真是悲惨又萎靡的几个月。
Life was hard and enervating.
人生艰难,令人委顿。