The amount of energy pushed through a filament that actually emerges as visible light is around 2 percent — most of the rest is lost as heat.

经过灯丝产生可见光的能量只占总能量的2%，余下的大部分以热能的形式丢失。

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The time can be read easily with a touch of the button. The first two columns show hours; in column 1 each light equals 5 hours, in column 2 each light equals 1 hour.

只要轻触按钮，就能轻松读取时间：前两列显示时；第一列每盏亮灯表示五个小时，第二列每盏亮灯表示一个小时。

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Antidepressant medication and psychotherapy can reduce SAD symptoms, either alone or in combination with light therapy.2.

抗抑郁药物和心理疗法可以减少SAD症状。它们要么单独使用，或者与光线疗法联用。

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And then we have c, the speed of light, 2.998 times 10 to the 8 meters per second.

然后我们知道光速等于，2，998乘以10的8次方米每秒。

麻省理工公开课 - 化学原理课程节选

This is a story that is predominantly in Genesis 2 and trickles into Genesis 3 and I'm going to look at it mostly in isolation from the first account.I'm going to be looking at it in light of an important parallel.

这个故事在《创世纪》2，3章中占据很重要的地位,我采用脱离对第一个故事的描述方法,将这两个故事，放在同等重要的位置上来解读。

耶鲁公开课 - 旧约导论课程节选

So here is a list of size 2, this is the light one, this is the heavier one.

这是有2个元素的一个序列，这杯轻一些，这杯重一些。

哈佛公开课 - 计算机科学课程节选

All that is packed into a surprisingly light 2.19-pound package (not including the keyboard).

ENGADGET: Acer unveils Aspire P3 Ultrabook convertible (update: video)

Dr Marinoni estimates that the combined effect of this crud could reduce the glaciers' ability to reflect light by 2-5% and increase the amount of melting by 12-34%.

ECONOMIST: Pollution in the Himalayas

The museum was open that day, leaving Mr. van Vliet and his team half an hour to light almost 2, 000 red, white and blue candles on its central staircase.

WSJ: Remco van Vliet, the Master Builder of Towers of Flowers | Creating