Earlier this month, General Atomics Aeronautical Systems Inc. began test-flying the newest model in its Predator line of unmanned attack craft.是什么意思_Earlier this month, General Atomics Aeronautical Systems Inc. began test-flying the newest model in its Predator line of unmanned attack craft.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句