旅游业是一个综合性极强的服务行业，这一行业的不同领域职业区别很大。
Tourism industry is so comprehensive in the Service industry that the occupations differ radically in different fields.
旅游业是一个综合性的服务行业，其产业链具有很强的关联性。
Tourist industry is a piece of comprehensive service industries, its industry chain has related the very strong one.
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