名词
中文翻译：马赫区域
同义词：
['Mach number', 'Mach number']
例句：
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1.The Mach region is where the speed of sound is highest.
马赫区域是声速最高的区域。
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2. The Mach region is also known for its high-speed trains.
马赫区域也以其高速列车而闻名。
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3. The Mach region is a popular destination for scientists and engineers.
马赫区域是科学家和工程师的热门目的地。