As a result, {HEAD ~ a large amount} of {TAIL ~ OH radicals} and ozone is efficiently generated, further promoting the combustion 
of
As a result , { HEAD ~ a large amount } of { TAIL ~ OH radicals } and ozone is efficiently generated , further promoting the combustion
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH