The uncle was reading a newspaper in the park.

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.

In this chemical reaction, cyclohexane is the main product.

In linear algebra, triangular matrices play a very important role.

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

There is a complex love triangle between them.

He is studying late into the night to learn a new computer language.

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