二阶矩矩阵：second-order moments matrix
二维共形场：two dimesional conformal field
耳后缘静脉：back ear edge vein
二维相关谱：correlation analysis
额外加工费：extra operation cost
鄂拉山断裂：the Elashan Mountain fault
二次趋势面：quadratic trend surface
恩2#滑坡：En-2 landslide
二维半导体：two-dimensional semiconductors
二次型估计：quadratic estimate
二维母函数：two-dimensional generating function
二室叶蝉属：Balclutha
二维突扩流：2D sudden-expansion flow
二阶孤子对：Second-order soliton pair
二维窗函数：2D window function
二带超导体：Two-band superconductor
二次弱理想：quadratic weak ideal
二元预小波：bivariate prewavelet
二甘醇乙醚：diethylene glycol ethyl ether
二级光散射：double scattering
二等水准网：second-class level web
额度审批制：quota approving system
二叠纪地层：Permian
二极管端泵：Diode end-pumped
二项式先场：binomial state
额定喷药量：Specified capaciey of spray medicine
俄勒冈振子：Oregonator
二叉树遍历：VB
二阶光滑模：second order modulus of smoothness
二叠蝎蛉科：Permochoristidae
二倍体鸭茅：Diploids dactylis glomerata L
二次判别法：quadratic discriminant analysis
二维熵阈值：Two Dimensional Entropy Threshold
恩格尔定律：Engle law
二阶段优化：two stage optimization
二倍体雄性：diploid males
鹅头型河流：goose-head-like rivers
二元全息图：binary hologram
二维自相关：two-dimensional autocorrelation
俄罗斯科技：Russia's science and technology
二元比较法：method of two elements contrasting
二蕊荷莲豆：Drymaria diandra BL
二维静态场：two-dimension static fields
二级迭代法：Two-stage iterative methods
二维编解码：time/frequency encoding and decoding
二次超曲面：quadratic hypersurface
二胞腔嵌入：2-cell embedding
俄罗斯建筑：Russian architecture
厄特渥斯值：Etvs value
二维零空间：two-dimensional null space