By then, China may have 70 attack submarines.

而到那时，中国可能已经拥有了70艘攻击型潜艇。

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China has bought 12 Russian Kilo-class diesel attack submarines.

中国购买了12艘俄罗斯基洛级(Kilo - class)柴油攻击潜艇。

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The PLA Navy operates five Type 091 (NATO codename: Han class) nuclear-powered attack submarines built by Huludao Shipyard in Liaoning Province between 1967 and 1990.

中国人民解放军（PLA）海军操作的五艘091型（北约代号：汉级）核动力攻击潜艇在1967年至1990年之间由辽宁省的葫芦岛造船厂建造。

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Jeong Kim, 39, is a former Navy officer who spent seven years aboard nuclear attack submarines.

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The number of attack submarines in the undersea fleet fell to barely 50 boats.

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"It does raise the question of why we need 10 carrier battle groups and close to 100 attack submarines, " he said.

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