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文献翻译英文原文CIRCUITVARIABLESANDCIRCUITELEMENTSELECTRICALANDCOMPUTERENGINEERINGAREEXCITINGANDCHALLENGINGPROFESSIONSFORANYONEWHOHASAGENUINEINTERESTIN,ANDAPTITUDEFOR,APPLIEDSCIENCEANDMATHEMATICSOVERTHEPASTCENTURYANDAHALF,ELECTRICALANDCOMPUTERENGINEERSHAVEPLAYEDDOMINANTROLEINTHEDEVELOPMENTOFSYSTEMSTHATHAVECHANGEDTHEWAYPEOPLELIVEANDWORKSATELLITECOMMUNICATIONLINKS,TELEPHONE,DIGITALCOMPUTERS,TELEVISIONS,DIAGNOSTICANDSURGICALMEDICALEQUIPMENT,ASSEMBLYLINEROBOTS,ANDELECTRICALPOWERTOOLSAREREPRESENTATIVECOMPONENTSOFSYSTEMSTHATDEFINEAMODERNTECHNOLOGICALSOCIETYASANELECTRICALORCOMPUTERENGINEER,YOUCANPARTICIPATEINTHISONGOINGTECHNOLOGICALREVOLUTIONBYIMPROVINGANDREFININGTHEREEXCITINGSYSTEMSANDBYDISCOVERINGANDDEVELOPINGNEWSYSTEMSTOMEETTHENEEDSOFOUREVECHANGINGSOCIETYWEBEGINOURSTUDYWITHANOVERVIEWOFCIRCUITTHISFOLLOWEDBYANINTRODUCTIONTOTHECONCEPTOFVOLTAGE,CURRENT,THEBASICCIRCUITELEMENTS,POWER,ANDENERGYNEXTWEINTRODUCEBOTHINDEPENDENTANDDEPENDENTVOLTAGEANDCURRENTSOURCESWECONCLUDETHISINTRODUCTORYCHAPTERWITHADISCUSSI