He is immersed in the study of panmagic squares.

His performance was perfect and without blemish.

In mathematics, a perfect number refers to a number where the sum of its divisors, excluding the number itself, equals the number.

This fish is completely farmed, and no capture is done in the natural environment.

This programming language is said to be Turing complete.

I am surprised by this unexpected event.

This was truly an unexpected result.

His thoughts were as we expected.

When I hear that song, old memories come to mind.

He is an expert in ethology, and his research is highly regarded worldwide.