(1) An aquifer is an underground bed of earth, gravel or porous stone that stores water.

(2) This drainage system is made up of a lower layer of rough, nonporous material and an upper layer of porous soil and sand.

(3) The captain's massive influence will be lost at a time when United's porous defence is allowing precious league points to leak away.

(4) Coating a porous material like foam with this polymer makes it hydrophobic, so it won't absorb water.

(5) Moreover, they can also be seen as potential shape-selective catalysts by analogy with the porous minerals, zeolites.

(6) A magnetic stir bar was placed in each chamber, separated from the root material by a porous metal screen.

(7) His stock also has been hurt by being shuffled around a lot on a porous defense.

(8) We do very much the same sort of thing in reverse when we try to get oil out of porous rocks like sandstone and so on.

(9) This really shook the home side, whose own defence also looked a little on the porous side.

(10) A porous paper may absorb a lot of the ink and as a result, the colors may be lighter.

(11) The porous defense is beginning to come under attack by the pitching staff.

(12) Most masonry materials are porous and will absorb large amounts of water.

(13) It is by nature a very porous material and often cannot be completely restored.

(14) The ion exchanger is porous and allows for a solution to permeate through the material.

(15) What that would tell Woodward was all about the porous defences rather than exhilarating attacks.

(16) He chased down his own grubber to be the next man to take advantage of the porous Lancashire defence.

(17) The result is the formation of solid structures of a porous calcium carbonate rock also known as travertine.

(18) Is there tension between one of the league's perennially elite offenses and one of its most porous defenses?

(19) Another is a rounded piece of clinker, a porous material that results from the burning of coal seams.

(20) The Australians had clearly targeted him and he lost the ball frequently in the tackle and was porous in defence.