Every morning now she turns on a specially constructed light box for half an hour and sits in front of it to trick her brain into thinking it's still enjoying those long summer days.

现在她每天早上都会打开一个特制的灯箱半小时，坐在前面，让自己的大脑以为它还在享受漫长的夏日。

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As autumn advances the days close in and the hours of light become fewer and fewer.

随着秋天的推移，白昼越来越短，光照时间也越来越少。

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The autumnal equinox and vernal equinox aren't even midway between the solstices, which are the days of greatest and least light of the year, she added.

春秋分日甚至不是二至日(夏至：一年中光照最强烈的时候。冬至反之)的中分界点，她补充道。

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One of Belfast's most iconic buildings will become a beacon of light on six days of the year.

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These days the wavelength of light used starts out at 193 nanometers.

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Although quasars are light days across, they are billions of light years from Earth, which means that most of what scientists know about them comes from extrapolations and not direct evidence.

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