Let's focus on the Valid from field.

让我们着重看看Valid from字段。

This offer is valid from now until further notice.

此优惠有效期由即日起，直至另行通知。

Valid From date: Start date of certificate's validity.

Valid From Date：证书有效期的开始日期。

Valid From Date: Start date of the CA certificate's validity.

Valid From Date：CA 证书有效期的开始日期。

Yet that is a fleeting number, and is only valid from one linear perspective.

然而，这个时间其实非常短暂，只从线性视角来看有效。