excitation lag激发滞后excitationn.刺激；激动；激发excitation motor-generator set励磁电动发电机组excitation force characteristics激励力特性excitation of gravitational field引力场激发excitation-contraction coupling兴奋收缩耦联excitation system ceiling voltage激励系统峰值电压Excitation-emission fluorescence三维荧光光谱excitation system ceiling volt age激励系统最高电压excitation-time imaging condition激发时问成像条件excitation-contraction decoupling兴奋收缩脱偶联excitation-at-the-mass method充电法