{HEAD ~ The materials} can be selected to have {TAIL ~ a desired size} or size distribution, and can be evenly distributed throughout the composition to provide controlled porosity 
selected to have
{ HEAD ~ The materials } can be selected to have { TAIL ~ a desired size } or size distribution , and can be evenly distributed throughout the composition to provide controlled porosity
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH