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

This plan was perfectly successful.

He played a perfect fifth scale on the piano.

This programming language is said to be Turing complete.

His birthday party was like a wonderful feast, a Manchu Han Imperial Feast.

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.

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