Instead, it assigns a Universally unique identifier (UUID) to each and every document, making it almost impossible for another database to accidentally select the same unique identifier.

相反，它为每个文档分配一个通用惟一标识符(Universally Unique Identifier, UUID)，这就杜绝了其他数据库意外地选择相同的惟一标识符的情况。

youdao

Of course, a "touchscreen for a DSLR" is a bit tricky to patent on its own, so Canon is taking a slightly more unique approach: attempting to patent a touchscreen that prevents you from accidentally touching things when you hold the camera up to your face.

ENGADGET: Canon patent application points to touchscreen DSLRs