He was working abroad for twelve months.

The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 251 million years ago.

He was affected by secondary effects.

This two-dimensional array represents students in each row and subjects in each column.

Binary operation is one of the basic concepts in algebra.

Silicon dioxide is a major component of glass and ceramics.

The great icosihemidodecahedron is a cube with a very complex shape.

In behavioral sciences, the use of metatools plays a crucial role.

I will hold my birthday party on the twenty-seventh day of the month.

We have our wedding on the twenty-ninth day of the month.