求翻译：（1） 房地产门户网站 (综合站点)：包括《中国房地产信息网》、《中国房地产联合网》、《北京房地产网》《易居网》等；是什么意思？

(1) real estate portal (integrated site): including of the China real estate information network, the real estate network, and the Beijing real estate network such as the Habitat Yi network;