数据结构几句英语翻译

A tree is a data structure which has zero or more nodes organised In a hierarchical manner(i.e. on several levels) such that:
(i) except when the tree is empty, there is one node called the root, at the highest level;
(ii) every node, except the root, is joined by a branch to just one node at the next higher level;
(iii) one item of information of a predefined type is associated with each node;
(iv) a predefined relationship exists between the information on adjacent levels.
大致理解，但是有点小小的问题，就是
1、one item of information of a predefined type is associated with each node这句翻译这不顺，总是没有数据结构的意思，
2、a predefined relationship exists between the information on adjacent levels.再就是这句，能稍为讲一下最好
不要google翻译之类的软价，理解着翻，先谢谢！！翻好加分！一定！

几句英语翻译 几句英语翻译 帮忙 英语翻译几句 几句英语翻译,谢谢!! 英语翻译几句对话 几句英语翻译~~~~ 英语翻译...只有几句... 几句英语翻译. 几句初三英语翻译 几句英语翻译~谢谢~~