The ratio of the circumference of a circle to its diameter is called pi.

He is showing respect to the elderly.

The battles of the past are different from those of today.

He is a strong person.

His irregular lifestyle is having a negative impact on his health.

He completely finished the project.

The movie ended, and the word 'The End' appeared on the screen.

This project has finally been completed.

His worldview is completely upside-down.

She bought a new sports bra to go to the gym.