麦积山的游客量2004年为30万人，今年预计会增加到100万人，但旅游的直接和间接收入很难预测。
The flow of visitors to Maijishan is expected to grow from 300,000 visitors in 2004 to a million visitors this year. But direct and indirect revenues from tourism are hard to predict.
游客量的预测和分析是旅游规划与管理的基础性、关键性工作。
Forecast and analysis of tourist volume are the basis and key work of tourism planning and management.
但公司也提醒说，考虑到游客量可能有相当大的季节性变化，所以无法对今后的游客量和收益做出预测。
But it warned that, given the likely strong seasonal variation in attendance, it was not possible to predict future attendance or profits.
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