The telltales are specific "lines" in the spectrum of infra-red light from the plume. These correspond to the frequencies of light given off when water molecules are energetically excited.

表明这一迹象的是撞击掀起的尘土中显示的红外线光谱中的一些谱线，其频率与水分子能量激发时所发出光线的频率相应。

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They stopped using the red light and got rid of the go-go girls, and Miss Bicentennial took off.

他们停止使用红灯，剔除了歌舞表演女孩，停止了双百年小姐的表演节目。

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Think about a light bulb; if you apply a current, the filament gets hot and begins to give off light of different colors - red then yellow then blue.

试想下灯泡，如果接通了电流，灯丝会变热继而发出不同颜色的光-从红到黄再到蓝色。

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we race off under the compulsion of the meaning of the red light, which is "go," right?

他看到红鼻子的驯鹿就出发了，因为红色代表出发，对吗？

耶鲁公开课 - 文学理论导论课程节选

The phytochrome can then be exposed to a different shade of red light to turn the gene off.

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Even something too small to emit visible light will probably give off radio waves and infra-red radiation (Jupiter does).

ECONOMIST: X marks the spot

That's because the city has equipped three bus routes with wireless technology that can pull off a trick every commuter has dreamed of: switching a red light to green on command.

FORBES: Magazine Article