This causes the leaves to give off a red glow, lighting the road for passersby without the need for electric power.
这能使叶子放出红色光晕，为行人点亮道路而无需耗电。
2
Electric discharge characterized by a cathode fall that is small compared with that in a glow discharge.
与辉光放电相比，阴极位降相对较低的放电形式。
3
Electric discharge lamp or vapor lamp: lighting device consisting of a transparent container within which a gas is energized by an applied voltage and made to glow.