He is majoring in psychology.

Gaku is my best friend.

He likes to take a walk in the park at dusk.

He is spending a lot of time on experimental research.

Well then, I'm off.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

Protein-degrading enzymes play a role in breaking down unnecessary proteins in the body.

The philosophy of Mohism, one of the thoughts of ancient China, advocated universal love and fairness.

He fulfilled his responsibilities as a government official.

We must absolutely obey the orders of the emperor.