如你所知，诺顿网络安全特警和诺顿防病毒软件是基于订购的服务。

As you know, Norton Internet Security and Norton AntiVirus are subscription based services.

youdao

如你所知，诺顿网络安全特警和诺顿防病毒软件是基于订购的服务。

As you know, Norton Internet Security and Norton AntiVirus are subscription based services.

youdao