年份动态
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dynamics by years
按年计算的动态
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Military contractors that have done well in recent years, like General Dynamics and Raytheon, can satisfy investors by just sticking with strategies that have already been proven to work.
FORBES: How Northrop Grumman Aims To Outperform
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