关系分析产生一个详细的输出，显示键标识符的引用完整性和域的一致性(或冗余)。

The Relationship Analysis results in a detailed output showing the referential integrity of key identifiers and the consistency (or redundancy) of domains. It should answer the following questions.

youdao

keys：只以ascii显示键，或通过hexkeys命令，用十六进制格式显示它们。

Keys: show just the keys in ASCII or, with the hexkeys command, show them in hexadecimal format.

youdao

操作：通常，公开数据模型属性中的所有操作是个好主意；但是，实现与不显示的键相关的操作可能没有必要。

Actions. In general, it is a good idea to expose all the actions in the data model properties; however, it might not be necessary to implement actions relating to keys that are not displayed.

youdao

The reason it printed that is I accidentally had my finger on the control key, which said print the last thing you had.

这是正确显示的，原因是刚才,我不小心按住ctrl键了，也就是这会显示你最后写的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选