耳廓皮肤：auricle skin
二维图象：2D image
二元酸酯：Dicarboxylic acids
二阶可微：Twice differentiable
二重对偶：biduals
耳舟旋蛛：Parasisis
二带七区：two zones and seven regions
二重元素：dual element
二型基数：bilattice semi-group
鲕状铁岩：oolitic ironstone
峨嵋台地：Emei Platform
二次增长：quadratical growth
峨文岭组：Ewemling Formation
二丙诺啡：diprenorphine
二体分离：Two-bodies separation
二值影象：binary image
二点函数：two-point functions
峨眉虫草：Cordyceps emeiensis
二次缩聚：two level condensational procedure
二滩坝址：Ertan dam site
二元流体：Two-fluid
二级决策：bilevel decision
二元数值：binary array
二胞枝孢：C. bisporum
二步估计：two-step estimator
二项抽样：Binomial sampling
二体运动：two body problem
峨口铁矿：Ekou iron mine
二次达标：reaching the method secondly
俄歇光谱：Auger electron spectroscopy (AES)
鹅掌楸碱：liriodenine
二次绕射：second time diffraction
二项发布：Bionomal probability law
二阶方法：second order approach
二次指标：quadratic performance criterion
恩姬蜂属：Endasys
二级导数：Second derivative
耳膜测量：ear membrane measurement
二次因子：quadratic factor
二维散射：two-dimensional scattering
二维动量：2-dimension momentum
鄂北豫南：northern Hubei and southern Henan
二维黑洞：dimensional black hole
铒料生物：Bait organisms
二聚酰胺：Dimer of amide
二阶指数：2 order exponent
二项反演：binomial inversion
二键合图：bond graph
二维校正：Two dimensional correction
儿童生长：Children growth