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
Maybe not. These are 350 yuan each.
不见得哦！这些表每只350元。
That's a good idea.
好主意。
He was obviously very nervous and for some minutes stood awkwardly before the microphone.
他显然非常紧张，局促不安地在麦克风前站了好几分钟。