中小城市[zhōng xiǎo chéng shì]
middle-sized and small cities; small-medium cities
1. Small-medium Cities：城市问题:problem of cities | 中小城市:Small-medium Cities | 小城镇:small cities and towns
2. Small cities and Middle cities：双城:Twin Cities | 中小城市:Small cities and Middle cities | 大城市:Big Cities
3. middle or small-scale cities：城市经济带:the cities economy belt | 中小城市:middle or small-scale cities | 资源型城市:resource-based-cities