Definition
when a situation reaches a critical point, requiring a firm decision or action.
到了關鍵時刻
If it comes to the crunch, we may need to cut our budget.
如果情況變得嚴峻，我們可能需要削減預算。
When it comes to the crunch, you see who you can really depend on.
當情勢發展到關鍵時刻，你就能看出誰是真正可以依靠的。
Though he was hesitant at first, when it came to the crunch, he decided to support us.
雖然他起初猶豫不決，但當情勢發展到關鍵時刻，他決定支持我們。