In those years, just after World War I, the military wanted to build an American highway system for national defense.

在第一次世界大战后的那些年里，军方希望为国防建设一个美国公路系统。

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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。

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"Our Navy can carry twice as many aircraft at sea as all the rest of the world combined," outgoing U.S. Secretary of Defense Robert Gates pointed out last year.

“我们海军在海上可搭载飞机的总数量，是世界其他海军搭载飞机数量总和的两倍。”美国国防部长罗伯特·盖茨去年就曾指出过。

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The ego is the first line of defense between the self and the outside world.

VOA: special.2010.04.13

President Obama surprised the world last Thursday when he announced plans to cancel a missile defense system in Europe proposed by the Bush administration.

VOA: standard.2009.09.24

But many Democrats have rallied to Holder's defense, arguing that a federal court trial for the alleged 9/11 plotters will show the world that the United States has faith in its civilian legal institutions and the rule of law.

VOA: standard.2009.11.25

It's the way they see the world defense industry going.

FORBES: Magazine Article

The Russian president has explicitly endorsed the value of a world of defense, not of defenselessness for the American people and his own.

CENTERFORSECURITYPOLICY: Center For Security Policy

At the suggestion of my friend, Bobby, who is Ali trainer Angelo Dundee's nephew, I driven 700 miles to Deer Lake, Pennsylvania, where Ali was preparing for a world title defense.

NPR: Boxer Muhammad Ali Turns 65