Ost
abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
You are?
是吗？
Again.
又来了！
In this way self-confidence grows, first from mastering a subject, then from being able to take about it.
这样，你自信心不断增强，先是因为掌握一门学问，接下来是因为能够就此发表见解。