Keeping light on our feet gives us freedom to experiment with different ideas, because there are less consequences to getting any of them wrong.

看清脚下的路，这让我们能够自由试验不同的想法，因为犯错的后果没多严重。

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However, its sun puts out about 25% less light, keeping the planet at its balmy temperature that would support the existence of liquid water.

因此，这一行星能够保持适宜的温度，这也意味着它可能有液态水的存在，而液态水是生命存在的关键指标。

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Now, a nightlight won't hurt, but keeping the TV or computer on or having your normal light on can cause us to wake throughout the night, disturbing our sleep.

现在，一个夜灯也没什么伤害，但是开着电视、电脑，或者开着平常的灯睡觉可能会让你整晚都醒着，扰乱睡眠。

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The mirror-less camera builds on its forbears, phasing out the mirror-based optical viewfinder of the SLR camera and adding an interchangeable lens mount, while keeping the light-weight feel of the compact camera.

FORBES: New Developments for the Camera Category

The power of a large and heavy size super-telephoto lens is available on the compact body of the SP-720UZ, fitting in the palm of your hand, and making it the perfect companion for keeping baggage light on a trip.

ENGADGET: Olympus introduces Stylus SP-820UZ, SP-720UZ cameras and SZ-14 binocular bundle

The key advantage for OLED is that the panel itself emits light, eliminating the need for a light source behind it and keeping the overall structure very thin and light.

WSJ: TV Makers Seek Fatter Profits in Thinner Sets