这位明星试图保持完美无瑕的形象，但公众并不相信。

The celebrity tried to maintain a ___whiter-than-white image, but the public didn't buy it.

这位政客塑造了一个洁白无瑕的形象，但大家都知道这只是装出来的。

The politician portrays a ___whiter-than-white image, but everyone knows it's just an act.