Transition elements play an important role in chemical reactions.

Oxygen, which is one of the chemical elements, is necessary for us to breathe.

He is a perfectionist, and his approach to work is very strict.

This programming language is said to be Turing complete.

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.

He is immersed in the study of panmagic squares.

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

Natural language understanding is an important field of artificial intelligence.

The depressed cowry lives quietly at the bottom of the sea.