His theory is difficult to understand.
- Jego teoria jest trudna do zrozumienia.
It's difficult to understand his theory.
- Jego teoria jest trudna do zrozumienia.
This theory consists of three parts.
- Essa teoria consiste em três partes.
The experiment confirmed his theory.
- O experimento confirmou sua teoria.
He developed his own theory.
- Hän kehitti oman teoriansa.
A good theory is characterized by the fact that it makes a number of predictions that could in principle be disproved or falsified by observation.
- Hyvää teoriaa luonnehtii se, että siinä tehdään useita ennustuksia, jotka voidaan periaatteessa kumota tai osoittaa vääräksi havainnoimalla.