Therefore, {TAIL ~ the air} can be sterilized and deodorized by {HEAD ~ the water and ozone bubbles} 
Therefore , { TAIL ~ the air } can be sterilized and deodorized by { HEAD ~ the water and ozone bubbles }
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD