依据博弈论中的“公共地悲剧”模型，分析了城市交通拥挤产生的经济根源，并利用获得的博弈结论，从供给和需求两个角度，给出了缓解城市交通拥挤问题的对策。
Therefore, in the paper, using the model of the tragedy of commons of the game theory, the economic origin of the urban traffic jam is analyzed.
对于即将面临的公共开支削减，黑斯廷斯悲剧地显得不堪一击。
Unfortunately, it is acutely vulnerable to the forthcoming spending squeeze.
我希望与美国人民一道在默哀过程中自省，并向在Tucson和Arizona两地公共悲剧中的无辜死难者致敬，包括那些仍为改善自身境况而奋斗的人民。
"I call on Americans to observe a moment of silence to honor the innocent victims of the senseless tragedy in Tucson, Arizona, including those still fighting for their lives," Mr.
我希望与美国人民一道在默哀过程中自省，并向在Tucson和Arizona两地公共悲剧中的无辜死难者致敬，包括那些仍为改善自身境况而奋斗的人民。
"I call on Americans to observe a moment of silence to honor the innocent victims of the senseless tragedy in Tucson, Arizona, including those still fighting for their lives," Mr.
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