Interactions are considered peer-to-peer message exchanges (that is, a request with an explicit response, a request with no response, or a single one-way notification).

交互被看作是点对点的消息交换(也就是一条有显式响应的请求、一条无响应请求或者单独一条单向通知)。

youdao

The 12-page document was issued in response to several breaches of its code, many of which included explicit music videos.

BBC: Ofcom: TV viewers 'less concerned about sex'