BY AN OFFICIAL CERTIFICATE的意思|示意

To get an official digital certificate signed by a recognized certificate authority, you need to generate a public-private key pair and use the public key to create a certificate request.

要获得由权威认证机构签名的官方数字证书，需要生成一个公开-私有密匙对并使用公开密匙生成证书请求。

PhytosANitary certificate is AN official document which attests to the phytosANitary status of ANy consignment affected by phytosANitary regulations.

植物检疫证书是证明货物的植物检疫状况符合植物检疫法规的官方文件。

The air Operator's Certificate (AOC) in a JAR-OPS environment (or air Carrier Certificate in the US) is an official document issued to an airline by the state civil aviation authorities.

该航空营运许可证(AOC)在JAR - OPS的环境(或在美国航空承运人证书)的正式文件印发，由国家民航当局的航空公司。