[据美国海军学院网2017年6月21日报道]美国海军想要购买一批导弹驱逐舰和攻击型潜艇,并打算在购买后对其进行设计升级,设计升级期间可能会影响该项目的稳定成本和进度,此举引起了一些国会议员的关注。引起议员们讨论的主要原因是阿利·伯克级驱逐舰和弗吉尼亚级攻击型潜艇多年的采购授权问题,他们将要面临购买驱逐舰后因设计升级至FlightⅢ型驱逐舰结构的时间延期, [According to the U.S. Naval Academy website, June 21, 2017] The U.S. Navy wants to buy a number of missile destroyers and attack submarines and plans to upgrade it after the purchase, which may affect the steady cost of the project during the design upgrade And progress, the move has aroused the concern of some members of the Diet. The main reason for parliamentarians’ discussions is the multi-year procurement authorization of Aliban Burke class destroyers and Virginia-class attack submarines who will face the time delay of upgrading their designs to Flight III destroyers after the purchase of destroyer,