二型胶原：Type Ⅱ collagen
二次衬砌：second lining
二阶滑模：second-order sliding mode
额定载荷：fixed load
儿科急诊：pediatric emergency
二线隧道：second-line tunnel
二次水滴：coarse water
二次振捣：secondary vibrating
二次碰撞：second impact
二级母钟：Secondary master clock
二级光谱：secondary spectrum
二次掏槽：secondary cut
二阶效应：second-order effect
二次受力：secondary load
二氯化钯：Palladium dichloride
二次挤压：double extrusion
二值重构：reconstruction
二次水泵：Secondary pump
二辊斜轧：2-roll rotary rolling
二次标定：secondary calibration
二维条码：2D barcode
二次杀伤：secondary kill mode
二次压降：voltage-drop on secondary circuit
二重积分：double integral
二级增压：two-stage turbocharging
二维流场：two-dimensional flow field
二维表示：2-D representation
二次调频：secondary frequency regulation
二次回路：secondary circuit
二次回采：Secondary recovery
二叉决策：Binary decision
二次切削：secondary cutting
额定功率：rated power
二氯丁烷：dichlorobutane
二位四通：4-2-way
恶意推荐：vicious recommendation
二维建模：2d modelling
二级泵房：the second pumping station
二元比度：duality comparing degree
二次冻融：secondary freeze-thaw
二阶段法：Two Stage Method
恶意脚本：vicious script
二阶分析：second-order analysis
二衬支护：reinforced concrete lining
二维测角：two-dimensional angular measurement
二级滑坡：landslide
二元函数：binary function
恶意软件：malicious software
二外俄语：Russian as a second foreign language
二次发生：second generation