二级分区：second-level zonation
二项模型：binomial model
二级压砧：mutli-anvil apparatus
厄特渥斯：Etvs
二类海水：case 2 water
二峰生长：diauxic growth
二次订货：two ordering opportunities
二级库存：two-echelon inventory
二手数据：second hand data
尔可夫链：Markov's chain
二路差分：Two-pass DINSAR
二维坐标：2D coordinates
二十八宿：twenty-eight hsiu
二级保费：two-step premium rate
二阶并联：parallel connection
耳角蝉属：Maurya
二色子图：bichromatic subgraph
颚毛属：Crossodonthina
二次问题：Quadratic problem
二轮找矿：secondary prospecting
厄米高斯：Hermite-Gaussian
二维叠阵：Two-dimension array
二值变量：Two-value variable
二齿黄菊：Flaveria bidentis
二重优势：dual Advantage
二次逼近：linear weighting method
厄米变换：Hermite transformation
恶性井漏：severe well leakage
二重原理：dual correspondence principle
鹅肠菜属：Myosoton
二次插补：Two Interpolate
二元叠加：Two-variable-added
二阶相干：second-order coherence
二空化泡：two cavities
二体峰值：binary peak
二次采集：re-acquisition
二值反应：binary response
二叉树图：binomial tree
二相介质：Two phases medium
恩洪煤田：Enhong Coalfield
二次规则：quadratic programming
二维涡旋：2-dimension vortex flow
二次博弈：quadratic game
额外推力：extra-push model
额尔齐斯：Altay Orogen
厄缶扭秤：E o ¨tv o ¨s torsion balance
二次幻方：quadratically-magic squares
二元比对：bi-comparison
鹅湖岩体：Ehu intrusion
二次变差：Quadratic Variation