Dielectric (電介質): an insulating material that can be polarized by an electric field.
Capacitor (電容器): a device that stores electrical energy in an electric field.
Capacitance (電容): the ratio of the charge to the applied voltage on the conductor; a measure of a capacitor's ability to store charge.
Farad (法拉): the unit of capacitance.
Polarization (極化): the alignment of electric dipoles in a dielectric material under the influence of an electric field.
Electric Susceptibility (電極化率): a measure of how easily a dielectric material polarizes in response to an electric field.
Dielectric Constant (介電常數): a measure of a material's ability to reduce the electric field strength within it.