preview release

基本解释

It wasn't a design that we were happy with and has been removed and will not be present in the next preview release.
我们对它的设计并不满意，因此它不会出现在下一个预览版中。
At first glance this appears to be a vast improvement but Federation in SQL Azure is still a long way away from even a preview release.
乍看起来，这似乎是很大的改善，但即便是 SQL Azure中的联合的预览版也需要很久之后才能够发布。
The Consumer JRE is itself another cluster of technologies that has recently seen its first preview release, including the Nimbus look and feel.
The Consumer JRE本身是另一个技术簇，最近看到了其第一个预览版，包括 Nimbus外观（look and feel）。

As this is a preview release, then there are few known issues, which we are working hard to address.
ENGADGET: Skype for Windows Phone 8 official preview available now (video)
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.
ENGADGET: Microsoft Windows Embedded Compact 7 tablet prototype preview
Microsoft also said that only a few of the visual changes in Windows 8 will be present in the Release Preview scheduled for release next month.
FORBES: Microsoft To Drop Aero From Windows 8 User Interface