It’s impossible to believe these two perfectly concentric circles. Wherever you look, there always
seems to be something wrong.
很难令人置信这是两只完美的同心圈,无论你从哪个方向看,总觉得有哪儿不对劲。
Hidden Circles 隐形圆圈
This image, resembling a wooden door or something, contains sixteen perfect circles. Stare at the
white x in the middle for a while, and they will suddenly pop out.