T1H4I1N1D2O1W4N1
15 points
THINDOWN is validvalid
reduction in ionizing radiation as it passes through a medium [n THINDOWNS]
a lessening of the number of atomic particles in the air [n -S]
reduction in ionizing radiation as it passes through a medium [n THINDOWNS]
a lessening of the number of atomic particles in the air [n -S]