Eagles sometimes hunt by standing in or near shallow water on a sandbank, spit, or ice-flow, grabbing passing fish.
en.wikipedia.org As the pores shrink, the overall matrix shrinks as well, which may eventually increase the space the gas can travel through (the cleats), increasing gas flow.
en.wikipedia.org The defining feature of a mole, however, is that water can not freely flow underneath it, unlike a veritable pier.
en.wikipedia.org This arrangement allows the water displaced by the passage of a narrow boat to flow easily under the towpath and around the boat, enabling relatively free passage.
en.wikipedia.org They sweep up or entrain the surrounding dense molecular gas to form a continuous flow of material, which is referred to as a bipolar outflow.
en.wikipedia.org