求翻译：作为旅游产业的主体行业，旅馆业、旅游交通业对旅游业的综合发展具有举足轻重的主导地位。航空公司和旅游产业的关系有两层作用：一是航空公司业务对旅游产业的保障作用，二是航空公司业务对旅游产业的拉动作用。纵观世界民航的发展趋势，第二个作用日益重要。是什么意思？

Important dominance as the main sectors of the tourism industry, hotel industry, tourism, transport industry of tourism development. The relationship between the airline and travel industry has two effects: First, the airline business role in safeguarding the tourism industry, the airline business r

The tourist industry as a main industry, hotel industry, travel and transportation industry for the tourism industry is vital for the development. Airlines and the tourist industry relations there are two tiers: a role for the airline business in tourism industry guarantees, 2 airlines are on the to

As the traveling industry main body profession, the hotel industry, the traveling transportation industry have the pivotal dominant position to the tourism integrated development.The airline and the traveling industry relations have two functions: One is the airline service to the traveling industry

As the main industry of tourism industry, hotels, travel tourism industry on the status of the comprehensive development of tourism has a decisive lead. Relationship between airlines and the tourism industry has a two layer effect: a protection role in the airline business on the tourism industry, t

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