Made of advanced composite materials, the Quiet Spike weighed some 470 pounds and extended from 14 feet in subsonic flight to 24 feet in supersonic flight.是什么意思_Made of advanced composite materials, the Quiet Spike weighed some 470 pounds and extended from 14 feet in subsonic flight to 24 feet in supersonic flight.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句