不存在官方认可的 RSS V2.0 模式文件，但在 Harvard Law 站点（参见 参考资料 一节）中可找到规范和提要示例。

There is no officially sanctioned schema file for RSS V2.0, although the specification and sample feeds can be found on the Harvard Law site (see Resources).

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“时代”并没有为这篇新闻提供一个时间表，twitter官方也没对此作出评论，但是，现在，它个我们提供了另一个twitter的商业模型，让我们去实现。你怎么看待这个有潜力的商业模式呢？

The Times doesn't offer any timetable for the release, and Twitter has no official comment on the story. But for now, it gives us another Twitter business model to contemplate.

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官方的空气质量指数也未能表现出一天之内的空气质量变化模式。

Offcial indices also fail to capture patterns of variation within a day.

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