The marines are interested in the VirtuSphere because real-life combat training facilities are expensive and often impractical, especially at temporary bases overseas.

海军陆战队之所以对虚拟球发生兴趣，是因为真实的战斗训练设施相当昂贵，而且经常不可行，尤其在海外的暂时基地里更是滞碍难行。

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Find Ways to Combat stress - Whenever someone has a relapse in their diet, it is usually during a particularly stressful time in their life.

找到抗压力的方法—一旦一个人在他的节食计划中出现了旧病复发状态，那么这个阶段一般是他生活中压力最大的时段。

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"When flying low in combat, speed is life. Now,from the left,Captain Smith and Captain Cox return to show center at 300 feet and nearly the speed of sound,".

VOA: standard.2009.11.15

The answer is that not one American lost his or her life in combat (though two died in a helicopter accident).

ECONOMIST: Old Glory��s strength

Dr. King was called to the pulpit, and I found my calling in life was to combat violence against women.

WHITEHOUSE: Combating Violence Against Women, My Calling in Life

It was developed by the Army to simulate combat and life in the military and reach young people for whom video games are a part of everyday life.

BBC: Sergeant Zedwick and Major Amerine feature in the game