英语语法分析

For a long time, for instance, AOL and CompuServe would not even exchange e-mails.

比如，AOL和CompuServe有很长的时间根本都不能互相交换电邮。

After all, the precursors were already evident: the PC, global online services like CompuServe, and carphones.

毕竟，预兆已经很明显：个人电脑，如CompuServe这样的全球线上服务，车载电话。

The early services, such as CompuServe, Prodigy or AOL, began as "walled gardens" before they opened up to become websites.

最开始的服务，例如CompuServe, Prodigy或者AOL在它们开始成为网站之前，都是以“有墙花园”开始的。