二次平均：Quadratic average method
二线双工：2wire double direction
二次分层：secondary stratification
俄气南供：Russian gas supplying the South
二元光栅：Binary grating
二维定位：location with two coordinates
二氧化体：cerium dioxide
二次余长：second optical fiber excess-length
二维索引：2-D index
恶性竞争：hostile competition
二因子法：Two factor method
二阶位移：second order displacement
额定出力：rated output
二级时隔：Second Time Interval
二元翼型：two-dimensional airfoil
二维半岛：two dimensional peninsula
二维制图：two dimensional drafting
二级配置：two-level distribution
二次涡系：secondary vortex
二维平面：dimensional plane
二次旋流：swirl flow
二级区划：second grade water function regionalization
二次同余：quadratic congruence
二次绕组：secondary winding
二维控制：2 D controller
二期通航：second?stage navigation
二相驱离：two-phase driven
二十域图：twenty realm graphic
二次改制：second institutional reform
鄂尔多期：Ordos
二次方程：quadratic equations
二次相移：quadratic phase shift
二级分离：two-stage separation process
二的规律：law of 2
二次悬挂：secondary suspension
二次调法：secondary adjustment method
二维制作：two dimensional design
二值运算：binary operation
二次挤密：secondary compaction
额定水头：rated head
二次搓毛：napping for two times
额外程差：extra optical path difference
二次相位：Quadratic phase
二次筛选：secondary screening
二维阻力：two dimension resistance
二次预测：Re prediction
二磺酸酚：C 6H 6S 2O 7
二个大局：overall interest
二期工程：stage Ⅱ works
二维视景：2D scene