SGS also develops and certifies its own standards.

信贷保证计划还开发和证明自己的标准。

A certificate is the document which can certifies something.

证书就是证明某事的文件。

SANDY: : Yes, the letter that certifies you have a disability.

珊蒂：是的，许可信是证明你有残疾。

It certifies the individual's identity as well as US citizenship.

它证明个人的身份以及美国国籍。

The result certifies that the suction system design is reasonable.

结果表明：给水泵吸入口系统设计是合理的。