Even the rad or gray , though, are still units that measure a purely physical event: the amount of energy left behind in a gram of tissue.
(Even the rad or gray; are; T:still; units that measure a purely physical event) (units; measure; a purely physical event) (energy; left; behind; L:in a gram of tissue)
Even the rad or gray units energy
are measure left
T:still units that measure a purely physical event
a purely physical event
behind L:in a gram of tissue