The units you see on nutrition labels are actually kilocalories, or a thousand calories.

您在值标签上看到的单位 一千卡就是一千卡，也就是一千卡路里。

Whereas the record-breaking ortho-diethynylbenzene dianion has a proton affinity of 440 kilocalories per mole.

而破纪录的邻二乙炔基苯双阴离子的质子亲和力为每摩尔 440 大卡。

So for example, sodium hydroxide releases about 250 kilocalories of energy for every mole, which is about six hundred billion trillion molecules.

因此， 例如，氢氧化钠每摩尔释放约 250 大卡的能量， 即约 6000 亿兆分子。

But the calories listed on your can of soda are actually kilocalories—each one equal to 1, 000 of the “small calories” that chemists use to measure energy.

但是标在罐装苏打水上的卡路里实际上是千卡，每千卡等于1000卡，这里更小的单位“卡”就是化学家测量能量时用到的。

Maybe you know that an adult in the UK will probably need about 1, 700 kilocalories a day on average; someone in Antarctica will need about 3. 500 - just over double!

也许你知道在英国一个成年人一天可能需要平均1,700千卡的热量，而在南极洲的人们则需要大约3,500千卡，翻了双倍多！