语言选择:
免费网上英汉字典|3Dict

Latin square

资料来源 : WordNet®

Latin square
     n : a square matrix of n rows and columns; cells contain n
         different symbols so arranged that no symbol occurs more
         than once in any row or column
依字母排序 : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z