Chinese phrase translation: 节骨眼儿 (jiéguyǎnr) critical moment

节骨眼儿 (jiéguyǎnr) critical moment

Usage:

“节骨眼儿”是指非常关键、重要的时候。这个词常用语口语中，表示在某个重要时刻发生了一些让人意想不到的或者不应该发生的事情。
“节骨眼儿(jiéguyǎnr)” means the critical moment. It is most used in oral language, which indicates what happened is unexpected or is not supposed to happen at certain moment.
Sentences:

1、Guò liǎngtiān jiù yào gāokǎo le,kě zài zhège jiéguyǎnr shàng, tā què shēngbìng le.
过两天就要高考了，可在这个节骨眼上，他却病了。
The college entrance exam will come in days, but he is ill now.
2、Míngtiān jiùshì zuìhòu de qīxiàn le, nǐ hái méiyǒu wánchéng rènwu. Dōu dào zhège jiéguyǎnr shàng le,nǐ zěnme hái wán ne ?
明天就是最后的期限了，你还没有完成任务。都到这个节骨眼上了，你怎么还玩呢？
Tomorrow is the deadline, but you haven’t finished your work yet. How can you play around carefreely at this moment?