Agglomerating and radiating effects are the two main functions of a central city. 中心城市的功能主要表現為聚集效應和輻射效應。
The cluster of small and medium commercial firms produces cluster effect and consequent competitiveness. 中小商業(yè)企業(yè)聚集經(jīng)營(yíng)能夠產(chǎn)生聚集效應，具有競爭優(yōu)勢。
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