緊要關頭的英文怎麼說？

緊要關頭除了直翻成a critical moment或a crucial moment之外還有哪些片語說法呢？

if/when it comes to the crunch：要是到了緊要關頭...；等到了關鍵時刻...

這個片語用在當情況變得非常嚴重，因此需要作出決定時。
If it comes to the crunch and you and your husband do split up, you can always stay with us.如果到最後關頭，你和你丈夫非得離婚，你總還可以和我們住在一起。

crunch：嘎吱的聲音
crunch這個字本來是指壓碎東西或嘴巴咀嚼的聲音，常寫作the crunch來代表嚴峻的形勢或緊要關頭等需要作出艱難抉擇的時刻。
The crunch came when she was forced to choose between her marriage and her career.關鍵時刻到了，她不得不在婚姻和事業之間作出選擇。

crunch time：關鍵時刻，面對困難時
crunch time常用在運動比賽等要分出勝負時高度緊張的時刻。
He plays well without pressure, but can he produce at crunch time? 他在沒有壓力的情況下打得很好，可是在困難時刻還能表現得同樣好嗎？
The team had trained well, but at crunch time they just couldn't perform. 這支隊伍受過良好訓練，但一旦到了關鍵時刻卻發揮不了。

if/when push comes to shove：一旦情況緊急，不得已時，危急關頭

這個片語用在當情況惡化到必須做出權宜之計時。push跟shove都是推的意思，不過shove是指大力推擠的動作，所以本片語是用推的力道加大來形容一個情況加劇。
If push comes to shove, we can always sell the car.實在不行我們還可以把車賣了。
If push comes to shove, I will recriminate against you by saying that you are guilty of malicious accusations . 如果事態嚴重的話，我會反控你誣告。

the moment of truth: 重要關頭; 決定性時刻；考驗人的時刻

這個片語常用在能夠分出事情成敗的關鍵時刻。
Lift-off is always the moment of truth for a new rocket. 發射升空始終是考驗一枚新火箭的關鍵時刻。
And now for the moment of truth: who is this year’s winner? 而現在是揭曉勝負的關鍵時刻，誰是今年的贏家？

if the worst comes to the worst: 如果發生最糟的情況

We should be in when you arrive, but if the worst comes to the worst, the neighbours have a spare key and will let you into the house. 你到的時候我們應該在家，萬一不在，鄰居家還有一把備用鎖匙，能讓你進屋。

參考資料：

https://dictionary.cambridge.org/dictionary/english-chinese-traditional/crunch

https://dictionary.cambridge.org/dictionary/english-chinese-traditional/if-when-it-comes-to-the-crunch

http://www.learnersdictionary.com/definition/crunch%20time

https://tw.dictionary.yahoo.com/dictionary?p=push+comes+to+shove

https://dictionary.cambridge.org/dictionary/english-chinese-traditional/the-moment-of-truth

https://www.macmillandictionary.com/dictionary/british/the-moment-of-truth

https://dictionary.cambridge.org/zht/%E8%A9%9E%E5%85%B8/%E8%8B%B1%E8%AA%9E-%E6%BC%A2%E8%AA%9E-%E7%B9%81%E9%AB%94/if-the-worst-comes-to-the-worst