While the three companies' systems vary in some details, they all take the same basic approach.

If any system varies from its expected performance, I feel it as an illness or slight pain.

However, the scoring system may change, and vary between different areas.

As a result, the systems in use and their effectiveness now vary across the fleet.

The system varies widely by field, and is also always changing, if often slowly.

The system varies in apparent magnitude from 9.6 to 14.

The systems can vary depending on what information the organization needs.

How does that happen, because the different legal systems vary enormously?

The systems vary so much that we can expect great difficulties in this area during the next century.

The systems, too, varied slightly from one world to another.