求翻译：但这种推广和实施涉及旅游客源市场、旅游目的地吸引物、旅游企业、旅游支撑和保障等多方面内容，难度较大。是什么意思？

However, this promotion and implementation involved in the tourist market, a tourist destination to attract many of the things, tourism enterprises, tourism, support and protection, the more difficult.

But this promotion and implementation of tourism source markets, as a tourism destination attracting property, tourism enterprises, tourism, and many other support and protection, it is quite difficult.

But this kind of promotion and the implementation involves the traveling source of tourists market, the traveling destination attraction, the traveling enterprise, the traveling support and the safeguard and so on the various content, the difficulty is big.

But the promotion and implementation of tourism marketing, tourism destinations, tourism attractions, tourism enterprises support and protection, and many other content, is quite difficult.

正在翻译，请等待...