They are my best friends.

Friendship is an important part of life.

Their friendship completely ruptured.

The negotiations broke down.

This plan was perfectly successful.

This project has been completed in its entirety.

They are my best friends.

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.