{HEAD ~ Molecules} having {TAIL ~ their moments} oppositely aligned will be defocused away from the axis 
having
{ HEAD ~ Molecules } having { TAIL ~ their moments } oppositely aligned will be defocused away from the axis
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH