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
I talked with him, and he understands completely.
我与他谈了 ，他完全了解。
Constant dropping wears away a stone.
滴水穿石。
Had he worked harder, he would have gotten though the exams.
如果他努力了的话，他就会通过考试的。