x-43a hyper-x
x-43a hyper - x
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The X-43A, or "Hyper-X" was built specifically to test scramjets, or supersonic ramjets, which burn fuel in air travelling at supersonic speeds.
BBC: Mach 10 scramjet prepares for launch
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