{HEAD ~ The containment} of the self luminous system within an envelope which does not pass any radiation prevents {TAIL ~ the deterioration} of nearby organic materials 
prevents
{ HEAD ~ The containment } of the self luminous system within an envelope which does not pass any radiation prevents { TAIL ~ the deterioration } of nearby organic materials
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH