Ost
abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
I've been working like a madman all day.
我今天一整天都像个疯子一样工作。
Experience is the father of wisdom and memory the mother.
经验是知识之父，记忆是知识之母。
Yes, there is one.
是的，有一个。