As US navy ships, spy planes and satellites monitor Chinese activity in the South China Sea, officials in Washington are keeping a close eye on a big submarine deal that could bring the US closer to its Pacific allies Australia and Japan.

您已閱讀7%(238字),剩余93%(3051字)包含更多重要信息,訂閱以繼續探索完整內容,并享受更多專屬服務。