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
Thank you, Dr. Stewart.
谢谢你，Stewart大夫。
Live and learn.
活到老，学到老。
It is animals and plants which lived in or near water whose remains are most likely to be preserved,
只有生活在水中或水边的动植物尸体最有可能被保存下来，