Aika is my best friend.

Kazuka is studying in the library every day.

Kisika is my best friend.

I enjoyed a picnic under the summer sky.

As the wind of the end of summer began to blow, I felt the arrival of autumn.

In linear algebra, the upper triangular matrix plays a very important role.

A lower triangular matrix is a matrix where all the elements below the main diagonal are zero.

How do you read Tangut script?

The Tangut language is one of the ancient languages of China.

Rurika is my best friend.