His theory is difficult to understand.
- Jego teoria jest trudna do zrozumienia.
We associate the name of Einstein with the theory of relativity.
- Einsteina kojarzymy z teorią względności.
The theory is too abstract for me.
- A teoria é abstrata demais para mim.
The scientific theory I like the best is that the rings of Saturn are composed entirely of lost luggage.
- A teoria científica que eu mais gosto é a de que os anéis de Saturno são compostos inteiramente de bagagens perdidas.
He developed his own theory.
- Hän kehitti oman teoriansa.
Practice is better than theory.
- Käytäntö on teoriaa parempi.