This helped to maintain the region as a center of trade.

Current students help to maintain class gardens and resolve environmental issues in the school.

These bodies or institutions help to maintain the social order within the community.

Understanding the basic operation of these systems may help you to better maintain them.

We as a country must help these companies to maintain an innovative spirit.

They also help to maintain the equipment and learn to analyze data.

This helped to maintain the original profile of the home.

The decision may help to maintain an international consensus on dealing with Iraq.

We must therefore join together in helping to maintain this system.

At the same time, it helps to maintain this power order.