Pre-flight
a. 飞行前的
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
🗣️ 情景例句
using as many letters as possible.
尽可能多用字母，
Stick to it, and you'll succeed.
只要人有恒，万事都能成。
and that their commissariat had no organization, but depended on irregular raids.
他们的军需供应处于无组织状态，只是靠临时抢夺来维持。