Optg
abbr. operating 操作的，运转的，营业上的
🗣️ 情景例句
Young drivers are more likely to be involved in an accident.
年轻驾驶员更容易出事。
How much will that be altogether?
总共多少钱？
acquired this man-made disease as a pestilence.
而欧洲自己却染上了这种人为的瘟疫般的疾病。