I enjoyed sandboarding at the sandboarding dome.

The Third International was a historically important organization.

He started a business without a plan, forgetting the lesson of 'peach and chestnut seeds take three years to bear fruit, persimmons eight years.'

I maintain my health by doing aerobic exercises every day.

This shape is called a gyrobifastigium.

This shape is called a gyrobifastigium.

The committee approved the new project.

He is researching on the pathogenesis and treatment of early-onset diabetes.

This area is rich in bedded cupriferous iron sulphide deposits.

Please teach me how to calculate the area of this circular sector.