Definition
If you can do something at a push, it means you can do it, but with difficulty or with extra effort.
勉強地，在困難的情況下。
At a push, I could finish the report by 3 PM if absolutely necessary.
在必要的情況下，我可以勉強在下午3點前完成報告。
At a push, they could fit ten people in, though it would be very cramped.
勉強的話，他們可以塞進十個人，雖然會非常擁擠。
We can finish the project by the deadline at a push, although it will be very tight.
我們可以勉強在截止日期前完成項目，雖然會非常緊張。