本文由税收收入同现行税制的关联分析入手，在税收收入增长轨迹同现行税制变动轨迹的联系中，试图捕捉支撑税收收入持续高速增长的“特殊”因素。
Starting from an analysis of the relation between tax revenue and current tax system, the paper is intended to find out the unusual factors supporting China's sustained and rapid tax increase.
但在20年前，研究人员发现，这些行星的轨迹有了微小的变动。
But 20 years ago, researchers showed that there were slight fluctuations in their paths.
利用变动图形吕的静止或相对静止因素，抓住主要动点及其与已知条件的联系，正确求出轨迹方程。
Use static elements or relative static elements in the changing graph to get the main moving point and its relations with other known conditions to correctly calculate the orbit equation.
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