The Navy plans to buy 12 ballistic-missile submarines to replace the 14 current Ohio-class, or Trident, boats that are nearing the end of their service lives.

海军计划购买12艘弹道导弹潜艇以更换正在服役的14艘俄亥俄级（三叉戟）潜艇，这些潜艇都快过服役年限了。

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Clegg does not want to renew Britain's Trident nuclear missile program.

VOA: standard.2010.04.23

The Obama administration has funded a replacement for the Trident missile submarine in 2029.

CENTERFORSECURITYPOLICY: Center for Security Policy | Mapping a National Security Failure: Ratification of the New START Treaty | Page: 18

It said it had no plans to review the future of the Trident missile programme ahead of next year's referendum.

BBC: Scotland politics

The Trident missile system, Britain's nuclear deterrent, is carried by submarines based at the Faslane naval base on the Clyde, near Helensburgh.

BBC: Protesters march against Trident in Glasgow