All employees at the submarine base require security clearance.

所有潜水艇基地的雇员必须得到安全部门的审查许可方可录用。

《牛津词典》

A U. S. SSBN is prepared for demagnetization at the Kitsap Naval Submarine Base near Bangor, Washington.

一艘美国SSBN在华盛顿班戈区附近的Kitsap潜艇基地准备消磁。

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It was a pattern which Sheridan would repeat many times - serving jail terms for refusing to pay the poll tax and a fine after taking part in blockades at Faslane nuclear submarine base.

BBC: The rise and fall of Tommy Sheridan and the left

The submarine headed back to its base on the Kola Peninsula, by the Barents Sea, which took five hours.

BBC: Eyewitness: Tragedy of Soviet nuclear submarine K-27

Meanwhile, Russia has sent a naval flotilla of seven warships led by an anti-submarine destroyer to its Syrian base at Tartus, according to Interfax news agency.

BBC: Envoy Kofi Annan presses Iran and Iraq over Syria crisis