Base level was the function of tectonic movements and climate circles, and base level for coastal basin in geological history was relative sea level.
基准面的变化是构造、气候的函数，对于地史时期的滨海盆地，基准面就是相对海平面。
By combining the approximate function with the two-level, multi-point approaching concept, a more perfect relative optimum algorithm is formed.
该逼近函数结合二级多点逼近概念形成了更完善的相应优化算法。
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