Light year means the distance that light covers in a year.
光年是指光在一年时间里所跑过的距离。
The screen covers a window, but still allows light to filter through.
屏风遮挡住了窗户，但是仍然能使光线穿透进来。
Extra rubber covers are available in gold, silver and light grey.
额外的涂胶可以被涂成金色的，银色的和浅灰色的。
Extra rubber covers are available in gold, silver and light grey.
额外的涂胶可以被涂成金色的，银色的和浅灰色的。
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