Pre-conditions
(pre-condition 的复数) n. 前提条件；先决条件
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
n. 形势, 情况, 环境
🗣️ 情景例句
My pleasure.
不客气。
This year I'm in a co-ed dorm.
今年我住在男女生合住的宿舍。
She finished it at half past nine. She went to bed before a quarter to ten.
30 她完成了作业。她9：45之前上床睡觉。