企业在经济活动中常常只追求内部经济性，滥用环境而不构成成本，将外部不经济性留给社会。
In their economic activities, enterprises often seek after only the inner economy, abuse environment without incurring any cost, and leave the outer economy to the society.
旅游业的外部不经济性将导致社会资源的低效配置。
Tourism externality would lead to the low efficient collocation of social resources.
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