to continue to work and be active when you have no energy left

I get the impression he's been running on empty for months now. A holiday will do him good. 我感觉他如今有好几个月都是在勉强支撑。放个假对他会有好处。

If a person or an organization is running on empty, they have no new ideas or are not as effective as they were before.

The fund-raising campaign was running on empty after ten years under the same leader. 十年都在同一个人的领导下，资金筹集活动只是在空转。