... 二次供水污染：secondary pollution in water supply 二级近似公式：the second order perturbation 二元液态金属：Binary liquid metals ...
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本文运用小参数展开法求解了这一大变形问题，获得应力场的二级近似公式。
By using the method of small parameter expansions the present boundary-value problem is solved. Thus the formula in the second approximation for the stress field is obtained.
本文给出了双粒子格林函数的能谱方程及其简单的推导过程，而且还推导出了在TDA近似下的顶角因子的二级近似公式。
We give the spectra equation of double particle Green Function and the process eliting it. As well as the second approximate formula of the TDA approximate diagram is also given.
由此总结出真-视二级参数间相互关系的近似计算公式。
From the conversion formulas, the approximativeinterrelation formulas between true and apparent parameters are deduced.
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