Even as I watched, the number and density of the white objects was increasing.

The density of stars increases toward the center in most galaxies.

That density increases as smaller city equipment is included in the mix.

But density has also increased, meanwhile, with the flight from the farm.

Someday, as the density increased, there might be public transportation.

As densities increased beyond the threshold so did travel time.

As density increases everyone wants to feel like they're in their own private enclave.

We design our projects in such a way that density can increase over time.

After six weeks, the densities had increased 9 to 31 times.

By ten, I had reason to believe its density considerably increased.