Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

This year's output increased by 20% compared to last year.

This factory has introduced the latest machines for mass production.

In Marxism, it is said that the relations of production form the foundation of society.

We are planning to establish a new production line.

The greater part of the time is spent on work.

This project was partially successful.

In French, the partitive article plays a very important role.