二灰砂浆：lime-fly ash mortar
二元理论：two-dimension theory
二层触发：layer 2 trigger
二次投影：secondary projection
二阶矩法：second order moment method
二层逻辑：second level logical
二级入轨：TSTO(two stage to orbit)
二次真空：double vacuum chamber
二期围堰：second phase cofferdam
二硅化铌：niobium disilicide
二值期权：binary option
二分分布：passing status
二次订单：secondary order form
二维重绘：reprotract two-dimensional plot
二维压缩：two-dimensional compression
二维投影：2D projection
二元特性：The specialty of the two_system of urban and rural area
二元进化：duality evolution
二相绕组：two-phase windings
二阶收敛：quadratic convergence
二分技术：bisection technique
二期模型：second-phase model
二区模型：two-zone model
二次发射：secondary emission
二级定位：two-stage positioning
二次防御：second recovery
二维碳化：2 dimensional carbonation
二次襯砌：secondary lining
二价动词：bivalent verb
二轮转向：two-wheel steering (2WS)
二次喷油：Twice electronic fuel injection
二次综合：secondary comprehension
二次隐藏：twice hidden
二级点火：Two Stage Ignition
二段成形：two_stage forming
洱海公园：Erhai park
二次给料：secondary feeding
二次振动：secondary vibration
二次聚合：two times aggregation
二次下电：second disconnection
二维水槽：two-dimensional flume
二次建模：two modelings
二维转角：two-dimensional rotation angles
二级污水：secondary urban sewage
二滩电厂：Ertan Hydropower Plant
二维调整：two-dimension adjustment
二次压浆：secondary grouting
二分算法：binary algorithm
二燃段烧：two-stage of coal combustion
二维测速：planar measured velocity