It satisfies the demands of professional hunting, field defense, household safety and sports.

满足专业狩猎，野外防护，家居防护，健身娱乐使用。

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For example if a team has a weak defense then the coach's strategy might be to control the ball and keep defense off the field.

比如说如果这支球队防守很差，那么教练的策略可能就是要求球队控制好球，做好场上防守。

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In computer field in the nowadays, the network safety is one of the most popular problem, but that the network defense on self's own initiative is that the network safety is important one ring then.

在当今计算机领域中，网络安全是最热门的课题之一，而网络主动防御则是网络安全重要的一环。

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Former Defense Minister Ali Ben Bongo led a crowded field of candidates.

VOA: standard.2009.08.30

The U.S. Department of Defense and the Indonesian Ministry of Defense signed a Framework Arrangement on Cooperative Activities in the Field of Defense that will enhance the quality of security cooperation.

WHITEHOUSE: The U.S.-Indonesia Comprehensive Partnership

Garner retired from the Army in 1997 as a three-star general and entered the private sector defense field.

CNN: Garner seeks to reprise his success

Despite differences in assessments, we have agreed to continue a joint search for solutions to challenges in the field of missile defense.

WHITEHOUSE: The White House