Optg
abbr. operating 操作的，运转的，营业上的
🗣️ 情景例句
Eight o'clock.
八点钟。
Better have something we can get our hands on rather than just spend all our time talking.
有些实际材料拿到手总比坐着闲聊强。
has spent his lifetime studying active volcanoes and deep caves in all parts of the world.
花了毕生的精力来研究世界各地的活火山和探洞。