primary key

基本解释

Any unique key or primary key must contain all of the partitioning key columns.
任何惟一键或主键都必须包含分区键中的所有列。
dict.cn
On the next page, you choose where to retrieve the value of the primary key (Figure 28).
在接下来的页面中，您要选择在什么地方检索主关键字的值（图 28）。
The typical method is to look up the entity by its primary key, because that will guarantee a unique result.
典型的方法是根据实体的主关键字进行查询，因为这可以保证产生一个独一无二的结果。

At the meeting with ambassadors from member states of the Organization of The Islamic Conference,or OIC., Albright laid out the project's strategies for combating Islamic extremism: First,elevate diplomacy as the primary tool for resolving key conflicts involving Muslim countries.

The column family is organized by customer ID (primary key), you have columns for first name, last name, address, and all the normal customer information, plus as many rows as are needed for each purchase.
FORBES: What You Need to Know About NoSQL Databases
In one particular speech—to a group of conservative supporters in the key primary state of New Hampshire—he let out all the stops, mugging, giggling, winking, and gesturing broadly.
FORBES: Rick Perry Overcompensates