He is a world-renowned zoologist.

Workers of all countries, unite, let's show our power.

She brought up her child alone.

His heart seems to have frozen.

I made a small robot with my new 3D printer.

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 enjoyed sandboarding at the sandboarding dome.

This shape is called a gyrobifastigium.

This shape is called a gyrobifastigium.