The development of the midcourse missile defense system has been plagued by gaps in flight testing over the years due in part to breakdowns resulting from the sheer complexity of the system.是什么意思_The development of the midcourse missile defense system has been plagued by gaps in flight testing over the years due in part to breakdowns resulting from the sheer complexity of the system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句