As it watches China build up its presence in the South China Sea, one reclaimed island at a time, the US military is betting on a new technology to help retain its edge — submarine drones.
目睹manbetx3.0 在南manbetx3.0 海(South China Sea)地区加强存在、每次声索一个岛的主权,美军正在押注于一项新技术来帮助其保持优势——无人潜艇。
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