These are pre-beta versions, not suitable for production use.

这些都是预先测试版本，不适合生产使用。

youdao

The attendees of those two conferences will have the opportunity to see pre-beta builds of Windows 7.

这两个大会的参会人员将有机会看到Windows 7的预览版。

youdao

Right now, that means that you have to use special pre-release versions, because it’s not even in beta yet.

现在，这意味着你必须使用特殊的预览发布版本，因为它甚至还不是测试版。

youdao

Holt notes that the company issued a pre-beta version of Office 15 in January, with a more streamlined user interface and touch-0centric features.

FORBES: Microsoft: Morgan Stanley Bullish On Office 15; Target $37

We'd already gotten the official word that H.264 support was included in Windows 7, but a tipster has lead us to believe that the pre-beta version of Windows 7 also includes native support for DivX.

ENGADGET: Windows 7 to natively support DivX and transcoding? HD

Though we were originally told in January that we could expect Android and iOS versions of the browser sometime this month, representatives at the company's booth at MWC noted that what we're seeing is actually a pre-beta version and the final product is "coming soon" with no specific timetable given.

ENGADGET