在最高级别上，可以在包括两个或多个books(例如整个参考资料集合)时指定根元素set。

At the broadest level, you can specify a root element of set when including two or more books; for example, a whole reference collection.

youdao

如果您想要在一个交通机构升级它的GTFS文件时获得通知，您可以订阅一个rss提要，您可以有选择地指定某个交通机构(见参考资料)。

If you want to be notified each time a transit authority updates its GTFS files, you can subscribe to an RSS feed, which you can optionally limit to a specific transit authority (see Resources).

youdao

VEP下载页面(请参阅参考资料)将指定需要哪些版本并且包含指向这些版本的链接。

The VEP download page (see Resources) will specify which builds are required and will contain links to them.

youdao