Recently, my mother's presbyopia has been progressing, making it difficult for her to read.

Our body is constantly excreting waste products.

This tree ages over the years.

Let's respect the elderly and learn from their knowledge.

I saw an old man playing with his grandson in the park.

The old man takes a walk in the park every day.

He is a famous author, and his works are loved by many readers.

He is an excellent doctor.

My spouse is a doctor.

That old man spends his days watching birds in the park.