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

This was just a PRE-beta release that was given out at a trade show so writers would write about the new version.

这只是一个提前测试版，在一个交易展览会上发布了出来，因此写手们就会对这一新的版本提出评论。

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