... second addition time 二次加法时间 second approximation 二次近似 secondary 第二的，副的，二次的，二次绕组 ...
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... 后件；后项；继项 secedent 二次逼近 second approximation 第二可数性公理 second axiom of countability ...
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differential second approximation arithmetic 差值二次逼近算法
second-order approximation 二阶逼近
second derivative approximation 二阶导数近似式
second-order approximation theory 二级近似理论
second-order implicity Legendre spectrum approximation 二阶隐的Legendre谱逼近
second born approximation 第二玻恩近似
second moment approximation 二阶矩方法
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。
The second approximation of the solution is of the same accuracy as theory of thin shells, and the first approximation is also sufficiently precise for engineering computation.
二次近似解达到薄壳理论所具有的精度，一次近似解也具有足够精度。
According to the dual theory, the dual programming was used to map the original problem exactly and the second approximation of the dual problem was set up by Taylor's expansion.
根据对偶理论，应用对偶规划精确映射原问题，再按泰勒展式建立对偶问题的二阶近似。
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