Sst
abbr. 超音速运输机（supersonic transport）
🗣️ 情景例句
You'll learn a lot.
会增长不少见识。
You give me the money. I'll get you the goods.
一手交钱，一手交货。
Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries
比如，很多公司向图书馆借阅科技书籍时感到很困难，