失去动力英语怎么说

失去动力在英文中一般可以用 "lose motivation" 来表达。"Motivation" 是动机、积极性或推动力的意思。因此，"lose motivation" 的意思就是失去动力或积极性。例如：
After months of working long hours and making little progress, I've started to lose motivation.
It's normal to lose motivation from time to time, but it's important to find ways to stay motivated.
希望这些信息对您有帮助。