Ost
abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
No.
不是。
It's up to us to help those in need.
我们有责任帮助那些有困难的人。
After a time, we noticed a snake charmer with two large baskets at the other side of the square,
过了一会儿，我们注意到广场的那一边有一个带着两个大筐的耍蛇人，