Pnr
abbr. point of no return 不可返回点（不能用自带燃料返回基地的航线临界点），安全返航点; prior notice required 需要预先通知
🗣️ 情景例句
I'll go upstairs and stay with him until he falls asleep again.
我上楼去陪他， 直到他又睡着。
His wife died a year ago. Now he lives alone.
他妻子去年去世了。现在他一个人住。
We have mainly adopted some usual international practices.
我们主要采取了一些国际上的惯例做法。