Ost
abbr. 科学技术局（Office of Science and Technology）
🗣️ 情景例句
Thanks.
谢谢。
He received full credit for his studies at a previous school.
他在一所先前的学校取得了所有课程的学分。
The most unusual car was a Benz which had only three wheels.
而最不寻常的一辆则要属只有3只轮子的奔驰牌汽车了。