The BSD part of the kernel calls down to the Mach part, but can call these functions directly, not requiring a Mach message.

内核的BSD部分可以调用内核的Mach部分，是直接调用这些功能，而不需要通过Mach消息。

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Here the gas velocity corresponds to a Mach number of one, denoting that the flow velocity is equal to the local speed of sound of the particular gas.

在这里，气速对应到一个马赫数之一，指该流速等于当地音速的，特别是天然气。

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The Japanese space agency, JAXA, is actually testing the idea, using special heat-resistant paper, another of Toda's plane designs, and a Mach 7 wind tunnel.

日本的宇宙航空研究开发机构(JAXA)正在实验这一想法。该机构利用特制的耐高温纸，采用户田拓夫另一个飞机设计，在一处7马赫的风洞进行测试。

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Apparently a small company named Mach 5 is stepping on their toes with a new "Profit Pod" device that can track arcade machines for money put in and tickets spat out, and then wirelessly transmit the information to a PDA or notebook computer.

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Mach is a measure of the ratio of the velocity of an object, in this case a plane, to the velocity of sound, which equals Mach 1, or 761.2 miles per hour.

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It travels at a speed of Mach 0.85, which is similar to the speed of other Boeing twin-aisle airplanes.

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