The tourism industry impacts upon many environmental and economic areas. 旅游产业对旅游地的环境和经济产生了很多影响。
Quantified identification of the cluster of tourist industry is a criterion to measure whether there is a cluster in a certain tourist area. 摘要旅游产业集群的量化识别，是衡量某一旅游区是否存在集群的一个标准。
