The U.S.Navy announced July 17 that Raytheon Co. has been awarded the $232 Million System Development and Demonstration (SDD) contract for the Joint Precision Approach and Landing System (JPALS).是什么意思_The U.S.Navy announced July 17 that Raytheon Co. has been awarded the $232 Million System Development and Demonstration (SDD) contract for the Joint Precision Approach and Landing System (JPALS).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句