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Wells supplied with pumps can extract water from the aquifer. noun - a layer of rock or earth that contains water or through which water can easily move. start learning
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a layer of clay hidden beneath a layer of lighter top soil. noun - thick, heavy soil that is soft when wet, and hard when dry or baked, used for making bricks and containers. start learning
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noun - sand and clay that has been carried along by a river and is left on land. start learning
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Gravel for the garden path. noun - small pieces of stone used to make paths and road surfaces. start learning
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A rounded stone formerly used in paving streets. noun - a rounded stone used on the surface of an old-fashioned road. / a rounded stone that is used on the surface of an old-fashioned road. start learning
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noun - a dark brown soil made from decaying plants that you can burn as fuel or that you can put around living plants to help them grow. start learning
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The soldiers returned to the trenches. noun - a long narrow ditch dug in the ground, especially as a protection for soldiers against gunfire. start learning
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A railway embankment. noun - an artificial slope built from soil or stones to stop floods, or to support a road or railway. start learning
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noun - a long, narrow hole in the ground next to a road or field, which water can flow through. start learning
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verb - 1. Dig a large hole for the plant, then backfill with soil and compost. 2. Finally, backfill the trench. / noun - some of the fluorite produced from the lead mines was used as backfill underground. verb - to fill a hole created by digging or drilling, especially using some of the material that has been taken out. / noun - material used to fill a hole that has been created by digging, etc. start learning
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Concrete foundations. noun - the part of a building, road, bridge, etc that is under the ground and supports it. start learning
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The explosion damaged the bridge, but the substructure remained intact. noun - a firm structure that supports something built on top of it. start learning
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noun - a type of concrete mix that has less cement in it that regular concrete. start learning
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noun - the methods and equipment used to support the walls of an excavation (trench) to prevent collapse during construction or repair work. start learning
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noun - uses a large steel plate to get rid of air pockets in various ground materials and provide tighter compaction. start learning
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