As they grew, the system would grow with them.

Both systems are growing, though, and now the field is finally level enough for a fair comparison.

As systems grow in size, they tend to lose basic functions.

But that is not the way the system has grown up.

As the system grew, there became a need for cheaper and more readily available materials.

Since then, the system has steadily grown to a two line 22 station network.

But during that period the interstate system grew only to 46,300 miles, or 7.9 percent.

The system as a whole is growing by about 25,000 students a year and there is no money for new construction.

We watched a system in Milwaukee grow from just two systems into a huge network.

If these systems grow towards each other, then that is all very well.