Since most of the flying at this stage of the F-22 program concerns developmental tests, why does the F-22 CTF need an operational test pilot?是什么意思_Since most of the flying at this stage of the F-22 program concerns developmental tests, why does the F-22 CTF need an operational test pilot?在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句