We keep on talking until the light is off.

我们一直聊到灯熄灭了。

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If the light is off then it isn't on.

如果灯灭了那么它不会再亮。

youdao

When the light is off, or black, the layer can’t be seen.

当在灯熄或黑夜下，图像时不能被看见的。

youdao

And instead of having the electron giving off energy as a photon, instead now the electron is going to take in energy from light and move up to that higher level.

与电子以光子形式施放能量不同,我们现在要从光中,获得能量到一个更高的能级。

麻省理工公开课 - 化学原理课程节选

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 body is having all sorts of light bounce off my eyes of various wavelengths.

身体可以通过不同的,波长把光线反射进我的眼睛

耶鲁公开课 - 死亡课程节选

If the light is off, the PZC is not plugged in.

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Buying them from China and Russia (and other countries) to ship them to the US where that high tech, highly paid, labour makes the high tech, high value added, part of the light bulbs which is then shipped off all around the world, to China, Japan, Germany, Holland, the Czech Republic and any number of other places to be finally made into the light bulbs.

FORBES: Ian Fletcher Again

The 60W is the latest old-fashioned light bulb to be switched off in favour of the fluorescent lamps, energy-saving halogen bulbs and LED lights.

BBC: The 60W bulb: A luminary love affair