PIN硅光电二级管  Si PIN diode

芭蕉河二级电站  bajiao river-ⅱ hydropower station; bajiao river-ⅱ hydroproject

二级电流互感器  second grade current transformer

二级电气督察  Electrical Inspector Class II

二级电压控制  secondary voltage control

二级电站  2nd cascade power station

二级电子变像管  two-stage electron image converter

二级电子市场  secondary e-market

二级电子镇流器  Two-stage Electronic Ballast

二级能源  secondary energy

二能级  Two energy-level

二能级激光器  two-level laser

二能级激射器  two-level maser

二能级开放量子系统  Two-level Quantum System

二能级模型  two-level model

二能级体系  Two-level system

二能级系统  Two-level energy system; Two-level system; two_ level system

二能级原于  two-level atom

二能级原子  two-level atom; two level atom; WT5BZ]Two-level atom; two-level atoms; Trapped ion