How much is the circumference of this circle?

He is an expert in immunology.

He was able to achieve success through effort.

Before starting a new business, he said, 'Nothing ventured, nothing gained.'

Japan and China have been trading for a long time.

El Salvador is a country located in Central America.

The game went into extra time.

Sweet peas are blooming in my garden.

I often go to see theatrical plays on weekends.

We do math exercises every day.