Singh noted that the preview release will contain two levels of API's.

Singh指出预览版包含两种层次的API。

youdao

On the Microsoft side, we find an preview release of the Microsoft SDK for Open XML Formats.

在微软这边，我们发现了一个针对Open XML格式的微软sdk预览版本。

youdao

This comes roughly a month after a preview release of the framework. Among the new features.

在Ext下一个版本的预览文章发布近一个月之后，ExtJS团队最近发布了该框架的2.0 alpha版本，包含以下新功能。

youdao

As this is a preview release, then there are few known issues, which we are working hard to address.

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Instead manufacturers, like ASUS and others, have to do their own engineering with the preview release and then the RTM build that will come later this year.

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"Since our first preview release last September, millions of people now use the pre-release product on a daily basis and millions more have been taking it through its paces, totaling hundreds of millions of hours of testing, " Microsoft's Steven Sinofsky wrote Friday on the Windows 8 blog.

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