The light is on. When you leave, please turn it off.
灯亮着。当你离开时，请把它关掉。
Never cross the street when the red light is on.
红灯亮时不要横穿马路。
The traffic must stop when the red light is on.
当红灯亮时，车辆必须停下来。
After all, it's hard to do a double-blind test when the subjects can see for themselves whether or not the light is on.
毕竟，要做双盲测试是很困难的，因为受试者自己可以看到灯是否亮着。
The light is on.; The lamp is lit up.
灯着了。
The light is on. He must be working.
灯亮着，他一定在工作。
电灯在裤子上。
Make sure the Power light is on.
确定「电源」指示灯已亮起。
If the red light is on, can you go?
如果红灯亮了，你能走吗？
The light is on. She must be at home.
灯亮着。她一定在家里。
The light is on, so he must be in the office.
灯亮着，他一定在办公室。
The light is on, so he must be at home now.
灯开着，所以他现在一定在家。
When the light is on, or white, the image is visible.
当在灯光下或白天，图像是可见的。
They can't have gone out, because the light is on.
他们不可能出去，因为灯亮着。
The light is on, because her mother always leaves it on.
灯是亮着的，因为她母亲总是让灯开着。
Our teacher must be in the office, for the light is on.
我们的老师一定在办公室里，因为灯是亮的。
Jane's light is on. She must be at home. She can't be out.
简的房间里开着灯。她一定在家，不会出去的。
The check engine light is on. We need to find a service station.
发动机检查灯亮了，我们得找一个汽车修理站。
If a check engine or service engine soon light is on, then deal with it immediately.
如果“发动机检查”灯或“发动机维护”灯是点亮的，那么就应该立刻对此进行处理。
He likens it to being a dark room: When the light is on, your brain is working properly.
他将之比喻为一个黑暗的房间：当灯亮着，你的大脑运行正常。
When the light is on, or white, the image is visible. When the light is off, or black, the layer can't be seen.
当在灯光下或白天，图像是可见的。当在灯熄或黑夜下，图像时不能被看见的。
Insert the charger plug to power, the charging begins when the red light is on and the seven-color light flashing.
将充电器插上电源，红色灯亮着且七色灯闪烁时充电开始。
"What's really novel is that this laser works in the opposite mode, where most of the time the light is on, but it turns off in very brief flashes, very brief dark pulses," said Wiener.
这种激光器的相反工作模式才是它真正的新奇之处，其中大部分时间光线是打开的，但它在很短的闪烁及非常短暂的暗脉冲里关闭。
Sometimes even a light touch on the face is enough to trigger off this pain.
有时甚至在脸上轻摸一下也足以引发这种痛苦。
没有灯亮着。
Do the following to ensure the safe operation of your smoke detector: if your smoke detector is working properly, the red light should be on.
为确保您的烟雾探测器的安全运行，请执行以下操作：如果烟雾探测器正常工作，则红灯常亮。
Only if the red light comes on is there any danger to employees.
只有红灯闪亮时才有危及职工的险情。
If you are looking up at the sky on a clear night and you see a sudden flash of light, it is probably a shooting star!
如果你在晴朗的夜晚仰望天空，突然看到一道闪光，那可能是颗流星！
If you are looking up at the sky on a clear night and you see a sudden flash of light, it is probably a shooting star!
如果你在晴朗的夜晚仰望天空，突然看到一道闪光，那可能是颗流星！
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