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

My father runs a real estate business.

The separation of powers is one of the basic principles of democracy.

In order to solve problems, it is important to listen to the opinions of many people, as the saying goes, 'two heads are better than one'.

In this chemical experiment, we will examine the properties of benzoic acid.

Sanpo Kojin is a god that appears in Japanese mythology.

Bile salts play an important role in the digestion of fats.

I have been to Santo Domingo.

We spread phosphate fertiliser on the field.

The era of the Three Sovereigns and Five Emperors is an important period in Chinese history.