He is working round the clock.

The twenty-four divisions of the solar year, or 'Nijyushi Sekki', is a system that divides the year into 24 parts according to the changes in nature.

My four treasures of the study are a fountain pen, a pencil, an eraser, and a ruler.

He is doing squats to train his quadriceps femoris muscle.

I saw a cackling goose in the park.

Please calculate the quartiles of this data set.

We have our wedding on the twenty-fourth.

This regular tetrahedron is composed of equilateral triangles on all sides.

This is a model of a muoctahedron.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.