It's difficult to solve this formula.

He drew a decagon shape.

He was drawing an enneagon shape.

He was drawing an icosagon shape.

I wonder where my medical thermometer is?

The Schwarzschild radius is an important concept for understanding the characteristics of black holes.

I bought a new measuring spoon.

He is a herbivore man, not interested in marriage or dating.

He learned the movements of the solar system using an orrery.

She made new friends on the online oekaki messageboard.