We conducted a spectral analysis to investigate the spectral characteristics of this substance.

It's difficult to understand the principles of electrooptics.

The house over there is very big.

This shape is called a great icosihemidodecahedron.

The Tōhoku earthquake off the Pacific coast, which occurred on March 11, 2011, was the largest earthquake in Japanese history.

He worked hard without giving up.

This shape is called a muoctahedron, in other words, a hexagonal four-piece square hole twisted polyhedron.

He is good at playing the electric guitar.

I spilled the powder in the kitchen.

I go shopping at the supermarket every Saturday.