The agency is the central research and development arm of the Department of Defense.

该机构是国防部的核心研究与开发部门。

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We have already succeeded in working out ground rules with the Department of Defense.

我们已和国防部成功地制定出了基本原则。

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The Internet was developed during the 1970s by the Department of Defense.

因特网是在20世纪70年代由国防部开发的。

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The Department of Defense provided financial support for the competition.

VOA: special.2011.06.21

be that with the Department of Defense or the State Department,

在国防部或者国务院，

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And the relay had closed on the poor creature, crushing it to death. The defense department didn't care about the loss of a moth.

可怜的虫子碾死了，国防部门并不关心,一个虫子的死活。

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Prince's company had eight Cessna aircraft in Afghanistan, working for the Department of Defense.

CNN: Excerpt: Inside Blackwater's mission in Afghanistan

They assured him that the Department of Defense was happy with the job they were doing.

CNN: Excerpt: Inside Blackwater's mission in Afghanistan

The Department of Defense this week "stood up" a military command dedicated to Africa.

WSJ: Into Africa