二次调和同态：quadratic harmonic morphisms
厄尔尼诺强度：strength of El Nino
二硫键重排剂：oxide-shuffling reagent
厄尔尼诺模型：El Nino model
二维波动方程：2-D wave equation
二重循环矩阵：level-2 cyclic matrix
鄂尔多斯北缘：north margin of Ordos
二十四点游戏：24 points game
二阶优化条件：second-order optimal condition
二维观测系统：two-dimensional observational system
二阶因子分析：second-order confirmatory factor analysis
耳孔蜈蚣亚科：Otosigminae
额济纳旗绿洲：Ejina oasis
二进制展开式：binary digital expansion of an integer
二维下料模型：the two-dimensional cutting stock model
二值响应模型：Binary Response Model
二阶线性方程：linear equations of second order
二维带状天线：two dimension strip shape antenna
二层规划理论：two-hierarchical programming theory
鄂东南湘东北：Southeast of Hubei and Northeast of Hunan
二部图的判定：T heory of Bipartite Graph
二阶渐近性质：Second order asymptotics
二次运移效率：secondary migration efficiency
二元经济转换：Dual Economy's Transformation
二次二阶矩法：second-order second-moment method
二齿新蚤种团：bidentatiformis group
恩斯特·卡普：Ernst Kapp
二层动态规划：two-level dynamic progrmming
二阶对称规划：Second-order symmetric programs
二阶F-凸性：Second-order F-convexity
厄特沃什效应：Etvs effect
二元函数极限：the limit of duality function
二阶三点边值：second order three-point boundary value problems
二级微扰公式：the second order perturbation formula
恶臭假单孢菌：Pseudomonas putida
俄歇峰形分析：Auger lineshape analysis
二叠系山西组：Permian Shanxi formation
厄尔米特矩阵：Hermitian matrix
二级统计体系：the two-level statistical system
鄂尔多斯周缘：periphery of Ordos Basin
二次李超代数：Quadratic Lie superalgebra
二叠系火山岩：Permian volcanic rock
二次降价销售：reduced-price selling
厄米特多项式：Hermite polynomials
二级结构参数：secondary structural parameter
二次函数逼近：Quadratic function
二要素表征法：Two-Parameter Description Method
额外推力模型：extra-push model
鄂西黄陵背斜：Huangling anticline western Hubei province
二次型的矩阵：Matrix of a quadratic form