Transonics
跨音速空气动力学
🗣️ 情景例句
I had a million things to do today.
我今天有成千上万的事要做。
I know the boy whose father is a missionary.
我知道那个男孩的父亲是传教士。
I entered the hotel manager's office and sat down.
我走进饭店经理的办公室，坐了下来。