Six identical triangles can be formed by drawing two straight lines through an octagon's center point.
经过八角形的中心画两条直线，能够得到六个一样的三角形。
2
You can explicitly search for a known hash value with point ranges, in other words ranges with identical start and stop keys.
可以使用点范围(即开始键和终止键相同)显式地搜索一个已知的hash值。
3
Configure two identical remote search servers on different nodes, point the search administration portlet to each of them, and configure a load balancer to balance requests between them.