最值得注意的是，Pointcast 网络使用一个屏幕保护程序来向用户的计算机显示器发送不断更新的新闻和广告流。
Most notably, the Pointcast Network uses a screen saver to deliver a continually updated stream of news and advertisements to subscribers' computer monitors.
网络性能下降，因为要将更新从应用程序服务器推送到数据库服务器。
Degraded network performance, as the updates were pushed from the application servers to the database server.
即使只是添加一条注释都会提醒浏览器更新应用程序缓存。
Even adding a comment will prompt the browser to update the application cache.
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