Osts
(ost 的复数) abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
Yes, I worked in a fashion shop last summer as parttime sales girl.
有，去年夏天，我曾在一家时装店任兼职售货员。
What's your friend doing?
你的朋友正在做什么？
We can also use satellites to help us make telephone calls to foreign countries.
我们也能利用卫星帮助我们打国际电话。