Mach number
[化] 马赫数
🧩 词语组成解析
Mach
[[mæk]]
n. 马赫数, 马赫\\n[计] 机器检查
🗣️ 情景例句
Ooh, speaking of keeping busy-I have an early start tomorrow,and the baby-sitter has to get home.
哦， 说到忙于工作，我明天还得早起，而且临时保姆也该回家了。
It is my pleasure to introduce the keynote speaker for today.
我很荣幸地介绍今天的主讲人。
How long can you hold your breath underwater?
你在水里屏住气不呼吸能呆多久？