delete rule meaning in English

参照约束的删除规则

The second command simply deletes rule number 3 from the
链删除编号为3的规则。
Expands to show information for the delete rule and the
展开以显示关系的“删除规则”和“更新规则”的信息。
Can be used to delete rules as well , which makes multiple dispatch using multimethods a bit more dynamic than is a static class hierarchy but you can also do some arcane things with python classes at runtime
的多分派比静态类层次结构更加具有动态性（但是您也可以在运行时用python类做一些隐秘的事）。
Table formatting tools enable you to add or delete rules , format rules , add color to cells , add rows and columns , control the alignment of cell contents , sort cell contents , merge cells , and split cells
表格格式设置工具用于添加或删除线条，设置线条的格式，设置单元格的颜色，添加行和列，控制单元格内容的对齐方式，对单元格内容进行排序，合并单元格及拆分单元格等。