By contrast, the manned SR-71 Blackbird, used for many years by the U. S. Air Force, had a top speed of just more than Mach 3.

相比之下，载人的SR - 71黑鸟，供美国空军使用多年，有一个仅比3马赫以上的速度。

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At altitude, its top speed is Mach 2.25 compared to Mach 2 for the U.S. F-16 Fighting Falcon, another multirole fighter aircraft made by General Dynamics and Lockheed Martin.

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