The only difference is where the heat comes from — to get it, you can light coal on fire, or you can create a controlled nuclear fission reaction.

区别仅在于热气从哪里来，你可以在火上燃煤，或者你可以创造一个可控制的核裂变反应。

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Sometimes, during the cold winter months, in order not to buy coal, which cost money and sometimes because she didn’t want to take the time from her studies, she did not light the small fire.

有时，在寒冷的冬季期间为了不花钱买煤，也不想要占用自己的研究时间，她连小炉子也不生火。

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Strict economy in coal, gas, and electric light.

严格节约煤、汽油和照明用电。

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Max Arthur Cohn's painting "Coal Tower" shows the dark form of a coal tower against a light sky.

VOA: special.2009.03.23

He ate alone by the light of a coal-oil lamp.

VOA: special.2009.06.27

Without any intervention from politicians or environmentalists societies that progress have been using m ore fuels that have less carbon with higher energy density (1 kg of wood fuels a light bulb for 1 day, 1 kg of coal fuels a light bulb for 4 days, 1 kg of crude oil for 5 days, 1kg of methane for 6 days and 1 kg of uranium for over 140 years).

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Dark coal-like rocks will also reflect less light than bright icy objects.

BBC: Asteroid thought to kill dinosaurs may not be guilty

The home that he has lived in since 1983, has been heated by two open coal fires, with candles providing his only light.

BBC: Northern Ireland