Online users are fickle.

在线用户是浮躁且无常的。

The list of online users isn't updated in real time.

不实时更新在线用户列表。

Next, you must be able to communicate with the online users.

接下来，您必须能够和在线用户通信。

Most online users have a search engine page as their homepages.

大多数在线用户使用搜索引擎页面作为主页。

Among online users the most popular news subject was the weather.

在线用户最常看的是天气预报。