element n、元件，成分node n、节点branch n、分支loop n、回路resistor n、电阻器impedance n、阻抗analog n、模拟digital adj、数字的pulse n、脉冲interface n、接触面，界面decoder n、解码器transformer n、变压器single-phase 单相pulsate vi、脉动three-phase power三相电源three-phase circuit 三相电路wye connection 星形连接delta connection 三角形连接phase voltage 相电压line voltage 线电压voltmeter n、电压表ammeter n、电流表clamp-on ammeter钳式安培表solid-state adj、固态的valve n、真空管，活栓semiconductor n、半导体switching n、开关diode n、二极管inverter n、反向换流器(逆变器) thyristor n、硅可控整流器inverter thyristor 晶闸管逆变器transistor n、晶体管substantial adj、牢固的fluorescent lamp ballast 荧光灯镇流器HVDC transmission system 高压直流输电系统induction motor 感应电动机rectifier n、整流器thyratron n、闸流管ignitron n、引燃管，放电管cycloconverter n、循环变流器spectrum n、光谱wafer n、圆片，晶片chopper n、斩波器polarity n、极性silicon-controlled rectifiers (SCR) n、可控硅整流器gate turn-off thyristors (GTO) n、门极可关断晶闸管MOS Controlled Thyristor (MCT) n、MOS控制晶闸管insulated gate bipolar transistor (IGBT) n、绝缘栅双极型晶体管bipolar junction transistors (BJTs) n、双极结型晶体管（三极管）field-effect transistors (FETs) n、场效应管forward-bias 正向偏置reverse-biased 反向偏置silicon-controlled 可控硅metal-oxide-semiconductor field-effect transistor(MOSFET) n、金属氧化层半导体场效应晶体管generator n、发电机electro-mechanical 机电electromagnetic adj、电磁的integral adj、积分的commutator n、换向器turbine n、涡轮机，汽轮机vibrating n、振荡oscillating v、振荡hydraulic adj、水力的cylinder n、汽缸power electronics 电力电子rating ranging额定范围capacitor n、电容器inductor n、感应器armature n、电枢reactance n、电抗resistance n、电阻transient adj、瞬时的，短暂的instantaneous adj、瞬间的electromotive force (emf) 电动势rheostat n、可变电阻器squirrel-cage n、鼠笼式adapter n、适配器brushless n、无刷out-of-synchronous adj、不同步的，失步的substation n、变电站circuit breaker 断路器compensator n、补偿器，自耦变压器busbar n、母线load frequency control 负荷频率控制optimal power flow 潮(电)流优化switchgear n、开关设备current rating额定电流voltage class电压等级solenoid n.螺线管auto-reclosing 自动重合闸(装置) glow-discharge n、辉光放电varistor n、压敏电阻，变阻器furnace n、燃烧室pulverizer n.粉煤机boiler n、蒸发器electrostatic adj、静电的electrostatic precipitator 电除尘coal hopper 煤斗burner 燃烧器cooling tower冷却塔feed water pump给水泵heater exchanger 热交换器condenser n、冷凝器turbogenerator n、涡轮发电机single-stage turbine 单级汽轮机multi-stage turbine 多级汽轮机superheater n、过热器high-pressure turbine 高压汽轮机reheater n、再热器intermediate-pressure turbine 中压汽轮机low-pressure turbine 低压汽轮机acid rain 酸雨greenhouse effect 温室效应electromagnet n、电磁体stator n.定子baseload n、基本负载photovoltaic adj、光电的battery back-up system 电池备份系统performance characteristics 运行特性physical property 物理特性manipulated variable 操纵变量feedback n、反馈comparator n、比较器disturbance n、扰动actuate v、开动flipping n、翻转luminous flux 光通量lumens n、流明variable n、变量accelerator depression 对加速的抑制accelerator pedal加速踏板carburetor butterfly valve化油器阀门light bulb 灯泡relay n、继电器photocell n、光电池follow-up system 随动系统external intervention 外部干预interdependent elements 相互依存的元件stimuli n、激励thermostat control 恒温控制cowl flap 整流罩flyball-governed 离心式调速器restraining spring 限制弹簧differential equation 微分方程independent variable 独立变量Laplace transform 拉普拉斯变换ratio n、比率initial condition 初始条件super-position 叠加性open-circuit 开路s-domain s域dynamic response 动态响应transient response 瞬态响应steady-state response 稳态响应angular position 角位置finite steady-state error 有限稳态误差servomechanism n、伺服机构process control 过程控制proportional term 比例项proportional gain 比例增益tuning parameter 整定参数instantaneous time 瞬时时间integral term 积分项accumulated offset 累计偏移量derivative term 微分项slope n、斜率fuzzy logic 模糊逻辑fuzzifier module 模糊逻辑块fuzzy inference engine 模糊推理机defuzzifier module 去模糊器模块microcontroller n、微控制器microprocessor n、微处理器integrated circuit 集成电路programmable logic controller程序控制逻辑器sensor n、传感器detector n.探测器,检波器elevator n.电梯sensitivity n.灵敏性offset n.偏移量bode n.伯德图lag n.滞后threshold n.阈值thermistor n、电热调节器thermocouple n.热电偶coil n、线圈bobbin n、线轴substrate n、基底linearity n、线性strain n、应变gauge v、测量insulating adj、绝缘的Wheatstone bridge 惠斯登电桥transmitter n、传导物，发报机sender n、寄件人，发报机indicator n、指示器piezometer n、压力计，压强计manometer n、压力计bourdon tube n、波尔登压力计deflection n、偏差dielectric n、电介质，绝缘体piezoresistance n、压电电阻tiltmeter n、测量地面倾斜角度之仪器oscillator n、振荡器crosstalk 串扰，交调失真air gap 空气隙cross-sectional area 横截面积reluctance n、磁阻armature n、电枢rectification n、校正，整流demodulation n、解调，检波filtering n、过滤variable-reluctance tacho generator n、可变磁阻测速发电机inductance n、感应系数waveform n、波形Ⅱ。

Translate the following sentences into Chinese。

(2)Although current and voltage are the two basic variables in an electric circuit，they are not sufficient by themselves。

For practical purposes，we need to know how much power an electric device can handle。