预测未来10年森林生物灾害的发展趋势为：（1）总体发生趋势平稳；
The occurrence trend of forest bio-disaster in the next 10 years is predicted; (1) The total occurrence trend will be steady;
产出和生产率，究竟是趋势平稳，亦或差分平稳，是现代宏观经济学争论的重要议题。
It is a controversial issue whether the output and productivity follow a trend-stationary or difference-stationary process in modern macroeconomic theory.
通过考虑结构变化的单位根检验发现，1985～2008年的国内旅游年人均出游率是一个带有两个结构突变点的趋势平稳过程。
Based on the unit root test with structural changes, the results show that the Chinese domestic per tourism rate from 1985 ~ 2008, is stationary trend with two structural broken points.
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