The structure and operation principle of a new-type of two-stage extendible exit cone nozzle with a jettisonable deployment system are presented.是什么意思_The structure and operation principle of a new-type of two-stage extendible exit cone nozzle with a jettisonable deployment system are presented.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句