🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
🗣️ 情景例句
Would you kindly hold these keys, please?
请帮我拿一下钥匙。
All men cannot be first.
不可能人人都得第一名。
Excuse me. Where's the toilet, please?
请问洗手间在哪？