Sst
abbr. 超音速运输机（supersonic transport）
🗣️ 情景例句
Here's my ticket and seat assignment.
这是我的机票和座位号。
Every salesman boasts of his own wares.
老王卖瓜，自卖自夸。
As I expected, he did not believe me.'Try it!' I said encouragingly.
“你就闻一闻吧！”我催促说。