For foreign key creation, another table with a primary key with a compatible data type is required.

对于创建外键，则需要另外一个具有主键的表，且该主键具有兼容的数据类型。

youdao

Key authentication is tried for each private key type found locally.

对于在本地找到的每个私有密钥类型，尝试执行密钥身份验证。

youdao

Data type of primary key columns, foreign key columns, and columns used on indexes.

主键列、外键列和索引上使用的列的数据类型。

youdao

"Other than some type of key-recoverable system, there is currently no viable technical solution to this problem for law enforcement, " he said.

BBC: Security and law enforcement: the government view

Ms. MAYER: Well, mostly, they'll type in key word searches.

NPR: 'iPhone' Tops Google Zeitgeist List

Matias says it spent more than two years working on a new type of key switch -- a modified ALPS switch it's dubbed Quiet Click -- and it has indeed come up with something unique.

ENGADGET: Matias Quiet Pro review: a mechanical keyboard with less clickety-clack