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在贝尔x - 5和空军赋予的NACA研究人员一个机会来测试可变后掠翼。
The Bell X-5 gave NACA and Air Force researchers a chance to test out variable-sweep wings.
youdao
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在贝尔x - 5和空军赋予的NACA研究人员一个机会来测试可变后掠翼。
The Bell X-5 gave NACA and Air Force researchers a chance to test out variable-sweep wings.
youdao