The castle was built during World War II as an air defense base against German bombers.

该城堡建于二战期间，是个用于抵御德国轰炸机的防空基地。

youdao

You must set up an airtight base defense immediately, blocking the two base access roads at their chokepoints (2 and 3) and putting defense on the high ground overlooking both chokes.

你必须建立一个密闭的基地防御，挡住了两个基地在敌军的阻塞点(路2号和3号)、临河高地的防守上都化油器。

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Russia's Defense Ministry, however, continued to rely on Skrunda's early warning system, and as a result the radar base was for years used as a negotiation tool between Washington and Moscow.

俄罗斯国防部却还在使用斯库纳达的早期警戒系统，于是雷达基地成为这么多年来华盛顿与莫斯科的谈判工具。

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In two thousand six, Defense Secretary Robert Gates advised President George W.Bush to base a missile defense system in Europe.

VOA: special.2009.09.19

Although the revised plan involves anti-ballistic missiles installed at a former air base in Poland, defense experts say Moscow perceives the new project as less threatening to its security.

VOA: standard.2009.10.23

It will require further contraction of military bases, ports, airfields and depots and the defense industrial base and its suppliers.

CENTERFORSECURITYPOLICY: A fatal 'box canyon' for the G.O.P.?

This level exceeds that utilized by 95 percent of the American defense industrial base and is vastly in excess of what is currently available to the Soviet Union.

CENTERFORSECURITYPOLICY: Center For Security Policy

The serious downsizing and disruption of the defense industrial base - including in some cases the likely elimination of small businesses that provide unique parts for the supply chain.

CENTERFORSECURITYPOLICY: Destroying The U.S. Military From Within