Definition
To continue functioning or working despite having depleted one's energy reserves; often implies being active or productive while being exhausted.
強勝支撐（在精疲力竭的情況下繼續工作）
After working for 12 hours straight, she felt like she was running on empty.
連續工作了12個小時後，她感覺自己已經筋疲力盡了。
He has been working overtime a lot lately; I am worried he is running on empty.
他最近經常加班；我擔心他已經筋疲力盡了。
After finishing the marathon, I felt like I was running on empty.
跑完馬拉松後，我覺得自己已經筋疲力盡了。
(US) To describe a person or an organization that has run out of new ideas or is no longer operating as effectively as before; implies a state of stagnation or lack of momentum.
後勞不繼
Since the main founder left, the startup feels like it’s running on empty.
自從主要創辦人離開後，這家新創公司感覺就像在空轉。
After a few years of success, the team seems to be running on empty.
在幾年的成功之後，團隊似乎已經沒有動力了。
Without new leadership and vision, the organization is running on empty.
沒有新的領導和願景，這個組織正在空轉。