求翻译：1990年在加拿大温哥华召开的'90全球可持续发展大会上，旅游组行动策划委员会提出了《旅游持续发展行动战略》草案，构筑了可持续旅游的基本理论框架，并阐述了可持续旅游发展的主要目的是什么意思？

The '90 Global Conference on Sustainable Development, held in Vancouver, Canada in 1990, the tourism group action planning committee proposed a draft tourism sustainable development action strategy to build a basic theoretical framework of sustainable tourism, and elaborated on sustainable tourism d

In 1990, in Vancouver, Canada at the '90 World Conference on Sustainable Development, the Tourism Group action planning committee has been the tourism sustainable development action strategy to build on the draft sustainable tourism in the basic theoretical framework, and describe a sustainable tour

In 1990 convened in the Canadian Vancouver at the ' 90 whole world sustainable development congress, the traveling group motion plan committee proposed "Traveling Developed Motion Strategy Continually" the draft, has constructed the sustainable traveling elementary theory frame, and elaborated the s

In 1990, Canada '90 Global Conference on sustainable development to be held in Vancouver, tourism action group Planning Commission presented the draft strategy of action for sustainable tourism development, and build basic theoretical framework of sustainable tourism, and described the main purpose

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