二级相交：phase transition of second order
峨眉林蛙：Rana omeimontis
二阶啁啾：quadratic chirp
二进阶乘：binary factorial
二阶条件：the second order conditions
二阶压缩：second order squeezing
鹅湖岭组：Ehuling Formation
二进信源：binary entropy
二大规划：quadratic programming
鳄蜥皮肤：the skin of Shinisaurus crocodilurus
二次表示：quadric representation
二值图似：binary image
二次收获：Permeability
二维报表：2D report
二次沸腾：second boiling
二步电离：two-step ionization
恩兰虱科：Enderleinellidae
恩兰虱属：Enderleinellus
二级理论：Secondorder theory
二阶极限：second orer limit
俄汉编辑：Russian-Chinese edition
二次外延：Secondary Epitaxy
二进尺度：binary scaling
恶化趋势：Ecological system
二维引力：two dimensional gravity
二元工业：dual industy
二齿蝗属：Bidentacris
厄尔裸伞：G. earlei
额前皮质：perfrontal cortex
腭帆提肌：levator veli palate
腭帆张肌：tensor veli palate
二元样条：bivariate spline
厄米共轭：Hermitian conjugrtion
二_1煤：Ⅱ_1 coal
峨眉百合：Lilium omeiense
二维层裂：two dimensional spallation
二维明渠：2-D open channel
二重平均：turbulence froce
二次分叉：secondary bifurcation
二维空时：Bidimcnsional space-time
二分检索：binary searching
俄国革命：Russian Revolution
二线伦理：second-line ethics
儿童读经：children's classical works
儿童成长：children development
儿童哲学：philosophy for children
儿童游戏：children's play
儿童文学：children literature
二级网络：Secondary network
鄂中地区：central Hubei