Pre-requisite
n. 首要事, 必要事\\na. 首要的, 必须的
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
🗣️ 情景例句
Collecting matchsticks was fun, until that fateful day one of them caught alight.
收集火柴是一种乐趣，除非一天其中一根火柴不幸燃烧起来。
Do I need to be hospitalized?
我需要住院吗？
Would you put it on, please?
请您把帽子戴上好吗？