What distinguishes the name is that no two certificates from the same CA should have the same identity.

该名称的专有性在于任何来自同一 CA 的两个证书都没有相同的标识。

youdao

English and computer have been four two certificates.

已获英语四级和计算机二级证书。

youdao

National production of compressors standardized "two certificates" system, which permits the production of compressors and pressure vessels production license (gas tank).

国家对压缩机的生产实行规范化的“两证”制度，即压缩机生产许可证和压力容器生产许可证（储气罐）。

youdao

Determining Muse's true age is difficult because birth certificates are rare in Somalia,a country which has not had a functioning government for nearly two decades.

VOA: standard.2009.04.22

But in December, Mike earned two certificates -- and, by the way, finished with a 4.0.

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He also gives Ali two certificates saying he is authorized to use the rifles for self defense.

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Two certificates are offered at the NAIOSW: the Watch Encasing Technician Certificate which requires 640 hours of training over four months, and the Watchmaker Certificate which requires 3, 000 hours over two years.

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