Ost
abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
And I'll be able to show you around our city.
我可以带你在我们那儿四处看看。
I remenber the boy whose father owns a lake.
我记得那个男孩的父亲有一个湖。
Oil rigs have to be repaired frequently and divers,who often have to work in darkness a hundred feet under water,
钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，