英语翻译 雅思阅读

A points out that the tourism industry involves concepts that have remained amorphous to both analysts and decision makers. Moreover,in all nations this problem has made it difficult for the industry to develop any type of reliable or credible tourism information base in order to estimate the contribution it makes to regional, national and global economies. 求大神翻译一下这两句话！来自剑桥雅思10 Test3 第一篇阅读！

Meis (1992) points out that the tourism industry involves concepts that have remained amorphous to both analysts and decision-makers. Moreover,in all nations this problem has made it difficult for the industry to develop any type of reliable or credible tourism information base in order to estimate the contribution it makes to regional, national and global economies.

谷歌翻译，请试看看: MEIS（1992）指出，旅游业涉及到仍然无定形为分析师和决策者的概念。此外，在所有的国家这个问题使得难以为行业开发任何类型的可靠和可信的旅游信息库，以便估计它使区域，国家和全球经济的贡献。

美国乘务员协会以同样的理由反对禁止在飞机上使用手机的条例