您要查找的是不是：
- ARPANET started by the US Dept. of Defense for research. 美国国防部建立了阿帕网，作研究用。
- She's on attachment to the Ministry of Defense. 她现在隶属于国防部。
- This dreadful murder is surely the act of a madman. 这种令人惊骇的谋杀纯粹是疯子的行为。
- He was the then secretary of Defense. 他是当时的国防部长。
- Don't complain of anybody. This is an act of God. 不要抱怨任何人，这是天意。
- He was caught in the very act of espionage. 他正在干间谍活动时被抓住了。
- The act of intentionally shooting the puck far out of defensive territory in ice hockey. 死球冰球运动中故意将球打出防守方区外的行为
- She worked over the first act of the play. 她重写了剧本的第一幕。
- The attack on the ship is viewed as an act of war. 攻击了那条船已视作战争行为。
- Helping the homeless is an act of mercy. 帮助无家可归者是慈善行为。
- The act of scaling a fortified wall or rampart. 攀登，爬云梯攀登设防的高墙或城垣的行为
- Our line of defense was strongly fortified. 我们的防线壁垒森严。
- The attack on the ship was viewed as an act of war. 攻击了那条船已视作战争行为。
- The magazine's disclosure of defense secrets caused great attention. 该杂志对防务内幕的透露引起了极大的关注。
- An act of emptying, as of the bowels. 排泄排泄的行为，如排便
- This is an act of great heroism. 这是一种了不起的英勇行为。
- A means of defense or protection. 一种防御或者保护的方法
- This move constitutes an act of aggression. 这一举动构成了侵略行为。
- Offense is the most effective way of defense. 进攻是最有效的防守方式。
- I can't let this act of kindness go unnoticed. 我不能让这种好人好事湮没无闻。
