One writer suggested that if the perforations happen to be perfectly round,some little pebble should be inserted to break up the regularity of the circle.

• 一位作家说: 如果那些窟窿碰巧是非常圆的，那么，我们应该把一些小圆石塞进去，以破坏那些圆圈的有规则的线条。