polar
adj[attrib 作定语]
1 of or near the North or South Pole (南、 北)极的; 地极的; 近地极的
polar ice 地极的冰 * the polar regions 极区.
2 of (one of) the poles of a magnet 磁极的
polar attraction 极向引力.
3 (fml 文) (of opposites) complete; extreme (指相对的事物)完全相反的, 极端对立的.
I suggest that we ask users of this machine what they think about it. We can photograph them using it too. Then we can put their comments at the top of the advertisement in big print. We can bring in some humour too. People enjoy reading humorous ads.