These rugged terrains prevent people from having an elaborate commercial agriculture.

Attacking companies had to provide for 360-degree security as they maneuvered, since the terrain largely prevented them from mutually supporting one another.

Darkness and the difficult terrain prevented the complete collapse of Lee's line.

Mountainous terrain and sterility of the soil prevented cultivation.

The mountainous, heavily forested terrain prevented large masses of tanks from maneuvering.

Despite the potential solar energy that might be produced, Bhutan's mountainous terrain prevents maximum use.

The uneven terrain and the scarcity of water has prevented the growth of any large cities in this region.

The extremely difficult terrain has prevented exploitation of much of the forest.

This could not be provided though, as difficult terrain prevented tracked vehicles from moving across the Moro and up on to Pascuccio.

But in Washington tonight, senior officials said that at two sites, including Tilava Hill, difficult terrain prevented moving the weapons.