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- n. 马赫（奥地利物理家）；[航] 马赫数（飞行速度除以音速）
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1. In theory, the airbreathing engine could propel an airplane to speeds of Mach 7 or faster, enabling aroundtheworld flights that would take several hours.
从理论上讲，这种喷气引擎可以将飞机速度推进到7马赫甚至更快，使飞机能在数小时内完成环球飞行。
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2. So now I'm flying west on autopilot at Mach 0.83 or 455 miles per hour, true airspeed, and at this speed and latitude the sun is stuck in one place all the time.
现在我正朝西使用自动导航飞着，速度是每小时0.83马赫，也就是每小时455英里，真是够快的，在这个速度上，太阳似乎也静止了。
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3. Mr. Bezos said the rocketship had a test flight three months ago and was traveling at Mach 1.2 just before last week's accident.
贝佐斯说，这艘宇宙飞船三个月前曾试飞过一次，运行速度为1.2马赫，略超过失事时的速度。
- Mach
Mach / mɑːk ; NAmE mɑːk / / mæk ; NAmE mæk / noun [uncountable ] ( often followed by a number 常后接数字 ) a measurement of speed, used especially for aircraft. Mach1 is the speed of sound. 马赫，马赫数（速度单位，尤用于计算飞行速度，1 马赫等于音速） ◆ a fighter plane with a top speed of Mach 3 (= 3 times the speed of sound) 最高速度为 3 马赫的歼击机 Mach / mɑːk ; NAmE mɑːk /
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