When ON delete set NULL is active, when a record is deleted from the parent table, all records in the child table with matching foreign key values are set to NULL.

当ON DELETE SET NULL规则被激活时，如果一条记录从父表中删除，子表中的所有记录以及匹配的外键值都被设置为NULL。

youdao

You can create the ObjectName for your MBean to include these key properties with their values set appropriately.

您可以创建MBean的ObjectName，包含这些关键属性并恰当的设置它们的值。

youdao

It is useful when a table has a finite set of values for the fragment key (or partitioning key) and queries on the table have an equality predicate on the fragment key.

如果表格有一定数量的片段键(或者分区键)值，而且在片段键上有同等谓词的表格上查询时，它会很有用处。

youdao

having more capital, standing for a set of values is a key part of our power.

拥有更多资产，坚持价值观,是力量的关键。

普林斯顿公开课 - 国际座谈会课程节选

In my State of the Union Address, I set out six key strategic objectives for America's prosperity, security, and democratic values in the 21st century.

CNN: Bill Clinton Speaks To A Meeting Of Newspaper Editors