Kelvin is a way of measuring how hot or cold something is, used mainly in science.

Kelvin克耳文 is a way of measuring how hot or cold something is是一種測量冷熱程度的方法, used mainly in science主要用在科學上。

On this scale, water freezes at 273.15 K and boils at 373.15 K. The steps are the same size as Celsius steps; the difference is where zero sits.

On this scale在這個刻度上, water freezes at 273.15 K水在273.15 K結冰, and boils at 373.15 K在373.15 K沸騰。The steps are the same size as Celsius steps每一格的大小跟攝氏一樣; the difference is where zero sits差別只在零度定在哪裡。

Zero kelvin is absolute zero — as cold as matter can get, where particles have as little heat energy as physics allows. Room temperature is about 293 K.

Zero kelvin零K is absolute zero就是絕對零度 — as cold as matter can get是物質能達到的最冷程度, where particles have as little heat energy as physics allows這時候粒子的熱能已經降到物理學允許的最低。Room temperature室溫 is about 293 K大約是293 K。

You do not use Kelvin to talk about the weather or a fever; that would sound odd. Physicists, chemists, and people who study space use it because it starts from a true bottom, not from the freezing point of water.

You do not use Kelvin to talk about the weather or a fever你不會用克耳文來講天氣或體溫; that would sound odd那樣聽起來會很怪。Physicists, chemists, and people who study space物理學家、化學家,還有研究太空的人 use it會用這個單位 because it starts from a true bottom因為它是從真正的底部算起, not from the freezing point of water而不是從水的結冰點算起。

In careful modern writing the unit is just kelvin, with the capital-letter symbol K, and we do not put a degree mark in front of it — though actually many people still say 'degrees Kelvin' from old habit.

In careful modern writing在講究的現代寫法裡, the unit is just kelvin單位就直接寫kelvin, with the capital-letter symbol K符號是大寫的K, and we do not put a degree mark in front of it前面不加度的符號 — though actually many people still say 'degrees Kelvin' from old habit不過還是有很多人習慣說'degrees Kelvin'。