二次线性规划：quadratic linear programming
二面角反射器：dihedral corner reflectors
二维平面流动：two dimensional plane flow
二次泵变流量：secondary pump variable volume
二联碱基丰度：dinucleotide abundance
二元B-样条：deformation
二值数字图像：binary digital image
二次谐波计算：the 2nd harmonic calculation
二灰碎石结构：the slablized soil-based course
二维动床模型：2D movable-bed model
二维场景重建：2D view reconstruction
二苯甲酸甲烷：HDBM
二次相对评价：two-stage relative evaluation
二氧化铀坯块：UO_2 pellets
二元光学元件：Binary optical element
二极管激光条：diode laser bar
二氧化锰电极：MnO2 electrode
二次离子交换：two-step ion exchange
二阶控制系统：the second order control systems
二次空气喷射：secondary air injection
二次包络星轮：double enveloping star gear
二次回路接地：second loop grounding
二维模式匹配：two-dimensional pattern matching
二次互反定律：reciprocal law two times
二元二次回归：dualistic and quadric regression
二维仿真转台：rotational platform of two-axis simulator
二波耦合理论：wave coupling theory
二维速度测量：Measurement of 2-D velocity
二维类间方差：two-dimension between-cluster variance
二阶三点公式：two order and three points formula
二次回路接线：second loop return wiring
二次浪涌电流：second surge current
二元经济结构：dual economic structure
二阶插值近似：second-order interpolation approximation
二维工程图样：2D engineering drawing
二次再热机组：secondary reheat fossil fuel-fired unit
二次误差准则：quadric error metrics
二次正定函数：quadratic positive-definite function
二次存储函数：) quadratic storage function
二元指标体系：dual index system
二程式拖拉法：one return pulling
二级兴趣模型：twice ranks interest model
二级可调增压：regulated two-stage turbocharging system
二灰碎石基层：the Basecourse of the Lime-fly-ash Macadam
儿童活动空间：Activity Space for Children
二系悬挂结构：secondary suspension structure
二极管安全栅：diode safety barrier
二人零和对策：two-person zero-sum game
二度价格歧视：second price discrimination
二元线性插值：bilinear interpolation