When composition, light, and exposure are all superb, "best" truly is in the eye of the beholder.

当构图、光线及曝光都十分出色时，“最佳”实在是个人有个人的标准。

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She suspects there may be a link between humans' increased exposure to light at night and the increase in rates of obesity nationwide.

她怀疑，人们夜晚在灯光下暴露时间的增多与全国肥胖比率的增加可能存在着某种联系。

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The problem is, adolescents and teens may have limited exposure to the morning light.

问题是，青少年很少有机会充分地接触到上午的阳光。

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While most researchers agree that light exposure and melatonin can help reduce the symptoms of jet lag after arriving at your destination, not everyone thinks it makes sense to switch sleep schedules before a trip, which can cut into social time with family and friends.

WSJ: To Avoid Jet Lag This Summer, Travel Like a Scientist

"The good news is that people who stay up late in front of the television and computer may be able to undo some of the harmful effects just by going back to a regular light-dark cycle and minimizing their exposure to artificial light at night, " Bedrosian says.

CNN: Unplug! Too much light at night may lead to depression

Ultraviolet-light exposure potentially causes melanoma and contributes to the development of cataracts.

WSJ: The Crucial Years for Protecting Your Eye Health