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https://www.washingtonpost.com/archive/opinions/2004/05/09/a-proven-formula-for-how-many-troops-we-need/5c6dbfc9-33f8-4648-bd07-40d244a1daa4/
您即将离开知乎,请注意您的帐号和财产安全。
https://www.washingtonpost.com/archive/opinions/2004/05/09/a-proven-formula-for-how-many-troops-we-need/5c6dbfc9-33f8-4648-bd07-40d244a1daa4/