n.定购；命令；次序
动词order的现在分词形式.
Even as a boy he was always ordering his friend about. 他从小就老命令周围的朋友。
A numerical ordering of the ends has been used throughout for convenience. 为了方便，全部应用诸端点的数值次序。
A box of twenty sets of sequencing fun puzzle cards stimulate kids to learn the ordering of life cycles and events. 一套二十副的次序卡不单令小朋友学习生命过程及事序，更可从重新排序的过程中领会到因果关系及逻辑性。
n.边缘(设立疆界；边界标志物)
再排序
