George watched them, through the window, pass under the arc-light and across the street.
乔治从窗户里面望着他们在弧光灯下经过，走到街对面去。
As the bike wheels spin, the LEDs form an arc of light.
当车轮旋转时，LED灯形成一个光弧。
When an electric arc is produced in the material, light is produced.
一种物质中产生电弧时，光就产生了。
When an electric arc is produced in the material, light is produced.
一种物质中产生电弧时，光就产生了。
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