他打防守。
A Defense Department spokesman briefed reporters.
一位国防部发言人向记者们介绍了情况。
NATO defense ministers wrap up their meeting in Brussels today.
北约国防部长们今天在布鲁塞尔圆满结束了他们的会议。
The Defense Secretary gave an upbeat assessment of the war so far.
国防部长对迄今为止的战事进行了乐观的评价。
She is the chair of the Defense Advisory Committee on Women in the Military.
她是军队女兵国防顾问委员会的主席。
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。
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。
The best defense is to attack.
进攻是最好的防御。
Leagues are commonly made for mutual defense.
结成联盟往往是为了共同防御。
An alternative explanation is defense from predation.
另一种解释是防御捕食。
If that happens, the grasshopper has a backup defense.
如果发生这种情况，蚱蜢就有了后备防御。
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。
The tannins are part of the defense mechanism that is essential to longevity.
单宁酸是防御机制的一部分，对长寿至关重要。
The government has announced plans to cut back on defense spending by 10% next year.
政府宣布了明年削减10%国防开支的计划。
Now I want to talk about an animal that has a fascinating set of defense mechanisms.
现在我想谈谈一种有着很迷人的防御机制的动物。
In vertebrates, the immune system provides a multiple defense against internal parasites.
在脊椎动物中，免疫系统提供了对体内寄生虫的多重防御。
And, though the system was built mostly to make car travel easier, defense was not forgotten.
而且，尽管该系统主要是为了方便汽车旅行而设计的，但并没有漏掉防御系统。
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