Hexagonal pencils are cheaper to make than round pencils.Nine hexagonal pencils can be produced from the same amount of wood needed for eight round omes.The hexagonal pencil is also less likely to roll off a desk.

    为什么大多数铅笔是六边形？六边形的铅笔制作成本要比圆形铅笔低。制做8支圆形铅笔的木头可以造9支六边形铅笔。六边形的铅笔还不易从桌子上滚落下来。来源：英语沙龙

2007年06月28日