求翻译：海南建省办经济特区22年来，旅游业取得了长足的发展，现已经成为国民经济的支柱产业和龙头产业，是最具特色与潜力的外向型产业。　是什么意思？

22 years Hainanjianxing economic zone, the tourism industry achieved considerable development, now has become a pillar industry and the leading industry, is the most characteristic and potential export-oriented industries.

Establishment of the province Hainan special economic zone for 22 years, the tourism industry has made great strides in development, it has become a pillar industry in the national economy and leading industries, is the most unique features and potential of export-oriented industries.

Hainan special economic zone in 22 years, the tourism industry has achieved considerable development, now has become a pillar industry of the national