However, there may be constrictions too narrow for me to pass - " "My kind is adept at fracturing rock," the Erb flashed.

Whorls are compressed, subquadrate in section, higher than wide, with few narrow constrictions.

Regularly placed glycine residues on the M1 segments permits tight packing of the five central helices, forming a narrow ( 4Å) hydrophobic constriction.

From the bridge arch, a long, narrow constriction (only 6ft wide) leads around a shingle bank righthand bend.

Just north of that location the trail enters a narrow rocky constriction in a woods road.

Fluid pressure causes the pad to tilt slightly, creating a narrow constriction between the shoe and the other bearing surface.

When you turned it over, sand poured through a narrow constriction into the lower chamber, and its rising level marked the passage of the minutes and the hours.

The narrow constriction slowed them down as they piled up behind it, trying to get through.

The summit area is a gently domed promenade of moss and short grass, running along the ridgeline with a narrow constriction in the middle.

We were being squeezed into an ever more narrow constriction.