variable principle的用法和樣例：
例句
- In this paper the elastic and elastoplastic interal forces of Cable dome strueture are analysed by the energy Variational principle.
本文採用能量變分原理分析拉索穹頂結構的彈性和彈塑性內力。 - The general variational principle is employed in communicating information between subdomains with Lagrange multipliers, which yields a reduced-order coarse problem.
根據廣義變分原理，採用拉格朗日乘子在子區域之間交換信息，並建立其相應的粗問題。
