不过为了保持优势，美国需强化其前沿基地，在导弹防御和潜艇方面投入资金，并对抗中国在非对称电子战、网络战以及太空战领域的能力。

But to retain that advantage, America will need to harden its forward bases, invest in missile defence and submarines and counter China’s capacity in asymmetric electronic, cyber and space warfare.

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为了提高水下潜艇对抗反潜直升机的能力，需要尽快解决水下对空探测的技术问题。

Therefore, development of a technology for the submarine to detect the anti-submarine helicopter by monitoring the helicopter radiated noise in underwater is urgently required.

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1970年一种新的反潜型进入建造之内用于对抗海岸浅水区域潜艇威胁。

To counter submarine threats in the coastal shallow water in the 1970s a new anti-submarine model was introduced into production.

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