

В России используют Цельсий, а не Фаренгейт.
In Russia they use Celsius, not Fahrenheit.
Сегодня на улице тридцать пять градусов по Цельсию.
It's thirty-five degrees Celsius outside today.
Это по Цельсию или по Фаренгейту?
Is that in Celsius or Fahrenheit?
"Цельсий" is in the lesson "Hot weather" (Level 15), along with 12 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.