The illustration of optional zone and dilemma zone is given: when a driver's distance from stop line is longer than the minimum distance that is required for a driver to stop, he is at optional zone.

举例分析了当驾驶员离停车线的距离大于其停车所需最小距离时，他处于可选择区域，反之，则处于困境区域。

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Greece's case could present the European Central Bank and the European Union with a dilemma: whether to bail out the country or possibly see a euro-zone member face a debt crisis.

希腊的情况可能给欧洲央行(European Central Bank)和欧盟(European Union)带来一个两难问题：是伸手救助希腊，还是让希腊面临可能的债务危机。

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In many ways, the debt crisis confronts euro-zone leaders with a dilemma similar to that facing governments when the banking sector crumbled in 2007 and 2008.

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