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
OK. Good night.
好， 晚安。
It's raining.
外面下着雨。
and the trunk eventually becomes so sore that the elephant curls it up and seldom afterwards uses it for offensive purposes.
象鼻子最后疼得卷了起来，以后它就很少用鼻子去进攻了。