四个直辖市

The study found that the more economically developed cities, the higher of the efficiency, such as the four municipalities have reached an effective level of DEA.

研究发现，经济发达的城市效率较高，如四个直辖市均达到DEA有效水平。

Tianjin is one of China´s four municipalities, city center 137 km away from Beijing.

天津是中国四个直辖市之一，市中心距北京137公里。

Chongqing is the largest city with most population of the Peoples Repulic of Chinas four provincial-level municipalities.

重庆是中国四个直辖市中面积最大、人口最多的一个城市。

Today, Chongqing is a modern city, China´s fourth municipality after Beijing, Shanghai, and Tianjin.

今天，重庆是一个现代化的城市，中国的继北京，上海，天津第四个直辖市。

The People´s Republic of China, Chongqing is one of the four municipalities, located in southwestern China.

重庆是中华人民共和国四个直辖市之一，地处中国西南。