打开或关闭远程主机或服务器的套接字是一个网络操作，不需要对运行此应用程序的图像进行大量处理工作。
The ability to open and close sockets to remote hosts or servers is a network operation and does not require any large amount of processing on the image running the application.
这样就为视觉上有障碍的用户，以及在Web浏览器中关闭图像以便更快地装入页面的用户提供了文本。
This provides text for visually impaired users, and for users who have turned off images in their Web browser to make pages load more quickly.
墙壁显示还可以提供所显示图像的字幕和Swing组件，以显示关闭字幕的窗体(例如，显示任何播放的语音输出)。
The wall display can also provide captions for display-over images and Swing components, allowing for a form of closed captioning (for example, to display any spoken speech output).
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