The shooting-range is lit from underneath by rows of ruby-red light fixtures.

射击场被一排排宝石红照明装置从下面照亮。

《柯林斯英汉双解大词典》

To begin with, the laser palette was rather limited: helium-neon and ruby lasers emitted red light, and others produced invisible infrared.

刚开始时，激光的色彩是相当有限的：氦氖激光器和红宝石发出红光，其他激光器则产生不可见的红外光。

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His face becomes ruby under the lamp light.

灯光下他的脸色红润起来。

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Reverend William Hayden, an Englishman just three months a priest, was in front of McKeon and tilting toward the ruby glow of the sanctuary light in order to read his breviary.

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Once the light enters the ruby, its speed is slowed down to around the speed of sound (approximately 741mph) and the spinning motion of the rod drags the light with it, resulting in the image being rotated by almost five degrees: large enough to see with the naked eye.

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