And then we run a beta test for about three or four courses for a month.

然后我们为这些人提供一组测试，每月上三到四个课程。

youdao

With three beta releases under our belts, hopefully it won't be too much longer before we roll out our shiny new Opera Mini 4.

再线翻译了下到该是这样《三个测试版本下，我们的安全带，我希望这不会太长得多才推出，我们有光泽的新歌剧迷你4 。

youdao

Remember that mobile ad network that Facebook ushered into beta around three months ago?

ENGADGET: Facebook pauses efforts to launch ad network

During our invite-only beta phase, Spotify offers three great services, from absolutely free to paid subscriptions.

ENGADGET: It's here! Spotify lands in the US (video)

With an active directory and new security features, NT 5.0 is in the second phase of a three-part beta-testing cycle.

CNN: Some see ploy in Microsoft NT rename