即便是在十年或者更长的时间段内，增长率有着向平均回归的强烈趋势。这意味着一个国家现有的增长率对预测未来增长率通常没有多大作用。
This means that typically a country's current growth rate has very little predictive power for future growth rates.
对拟建道路远景交通量的构成及其各部分的发展趋势进行了较为全面的分析，并对远景交通量的年平均增长率进行了预测；
The risk of total cost is analyzed. Based on the analyses of the composing of highway future traffic and the development trend of every portion, the annual increasing rate is obtained.
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