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
I'd like to leave a message for him, if you don't mind.
你若不介意的话，我想留话给他。
Too much water drowned the miller.
过犹不及。
both men were genuinely sorry that they had to leave.
这二位不得不离开那个荒岛时，还真的感到遗憾呢！