So the US turned the YF-12 into a reconnaissance plane (the amazing SR-71 Blackbird, which remained in service through 1998 and could traverse the US coast to coast in 1 hour).
因此，美国最终把YF - 12改成了侦察机(即令人赞叹的SR - 71黑鸟。它可以在一个小时内横穿美国东西海岸，直到1998年才退役)。
In 1962, the first Blackbird successfully flew, and in 1966, the same year I graduated from high school, the Air Force began flying operational SR-71 missions.
1962年，黑鸟首飞成功；1966年(同年我高中毕业)，美国空军在常规任务中正式启用SR - 71。
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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