Instantaneous velocity
[化] 瞬时速度
🧩 词语组成解析
🗣️ 情景例句
Good morning, Mr. Kong.
早上好，孔先生。
He always takes pride in his work.He's very efficient.
他总是以他的工作而自豪，他是非常能干的。
Late in the afternoon, the boys put up their tent in the middle of a field.
傍晚时分，孩子们在田野中央搭起了帐篷。