二元归纳法：binary inductive method
二次剩余数：quadratic residue
鳄鱼嘴构造：crocodile structure
二次剩余码：quadratic residue code
额外维空间：extra dimensions
二叠-三叠：Permian/Triassic
二苯基二硫：Diphenyl disulfide
二叉正则树：binary regular tree
二次子问题：quadratic subproblem
二级挣值法：second-level earned value method
俄歇分支率：auger branching ratio
厄米特齐式：Hermite quadratic form
二对一映射：two-to-one maps
二价基甘油：diraolylgcerol
厄米不变量：Hermitian invariant
二阶全离散：second order fully discrete
二进制规划：binary quadratic program
二元平均值：binary mean
鄂东北地区：northeast Hubei
二叉树逼近：binary tree
二部置换图：bipartite permutation graph
二重态效应：two-doublet effect
俄罗斯科学：Russian science
二阶有限元：second-order finite element
二级近似解：second order approximate solution
二叉树算法：bintree ealculation
二元共聚合：dualistic polymerization
二叠系顶部：Uppermost Permian
二氨基丙烷：Diaminopropane
二进制小数：binary fraction
二维方势阱：two-dimensional square potential well
二次曝光法：two-time exposal method
二态小蛋白：small two-state protein
二次成像法：secondary imagery method
耳孔蜈蚣属：Otostigmus
二道江剖面：Erdaojiang section
二部竞赛图：Bipartite tournament
二阶矩过程：second moment stochastic process
莪术油微球：Zedoary turmeric oil gelatin microspheres
耳唇槽舌兰：Holcoglossum auriculatum
二次谐波法：SHG
二次特征值：quadratic eigenvalue problem
二阶相关度：second-order correlation function
二维线性系：Two dimensional linear system
二阶导数项：Second order derivative
二亲本杂交：bi-parental mating
二阶绕射势：second order diffraction potential
二级供应链：two-stage supply chain
二甲基硅芘：UV absortion
二次整数方：quadratic integer square