Osts
(ost 的复数) abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
He didn't get a thing to eat.
他什么也没有吃。
My father had an interview with the principal to discuss my work.
我父亲会见校长讨论我的功课情况。
Is it a black one?
是快黑的吗？