Within the mantle, forces developed which produced a penetration of the earth's crust.

Not until these forces had further developed over subsequent decades was the national movement able to be revitalized.

The Western forces have recently developed "claws", which are autonomous self-replicating robots to fight on their side.

Otherwise, inflationary forces will develop, especially if labor costs rise.

Powerful Outside forces had developed an interest in something that was sure to lead them to the Hive.

If not the tensile and compressive forces can develop within.

Around the same time, Muslim political forces were also developing in India.

As the productive forces develop so the struggle between classes intensifies.

For example, capitalism tends to increase the rate at which the forces develop and stresses the accumulation of capital.

By the end of the century the force had developed a detective department who were allowed to wear plain clothes.