Ost
abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
Max will always have a family member to watch over him
家里总会有一个人照顾Max
One should not run with the hare and hunt with the hounds.
不应两面讨好。
The captain learnt from the letter that the name of the lost ship was the Karen.
从这封信中船长了解到沉船船名是“卡伦”号。