对于带前置负号(负前缀)的模式，截断发生在非数字字符的点(包括了内嵌的负号)。

For patterns with a leading minus sign (negative prefix), truncation occurs at the point of a nondigit character, including embedded minus signs.

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城市属于某一国家的某一地区，城市信息包括(纯ascii)名称、带重音符的名称(可能包含外文字符)、人口数(如果人口数未知，就是0)、纬度和经度。

Cities are within a region of a country and have a (pure ASCII) name, an accented name (which might include foreign characters), a population (or 0, if unknown), a latitude, and a longitude.

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断言可以是一个简单的字符串或带多个子元素和属性的复杂对象。

An assertion can be a simple string or can be a complex object with many sub elements and attributes.

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