Ost
abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
Grandpa, you are a terrific guy!
爷爷， 你真了不起！
Can you afford the expense?
你出得起这笔费用吗？
I don't want to know what it's been; I want to know what it is now.
我不想知道它曾经是什么；我想知道它现在是什么。