{TAIL ~ The polymers} have {HEAD ~ a controlled degree} of hydrophobicity with a corresponding controlled degree of erosion in an aqueous or a biological environment of use 
{ TAIL ~ The polymers } have { HEAD ~ a controlled degree } of hydrophobicity with a corresponding controlled degree of erosion in an aqueous or a biological environment of use
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH