You can loginto this, not only chat with this interactively, but on the right-hand side here, you can actually grant us view or control of your own screen.
你可以登录这个,不仅仅是与这进行交互式聊天,在右边这里,你可以让我们查看或控制你自己的屏幕。
3
The presence indicator systems that IM users must loginto required more infrastructure.