英文：A measure of the induced voltage in a circuit caused by a magnetic flux and equal to the flux times the number of turns in the coil that surrounds it.
中文：碰撞，匝链电路中由于磁通量而造成电伏减少的单位，等于穿过一载流线圈的磁通量与线圈匝数之积
英文：The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength.
中文：发光效率一定波长的光量对同样波长的辐射光量的比例
英文：An instrument for measuring a property of light, especially luminous intensity or flux.
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