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。

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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 。

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

ENGADGET: Facebook pauses efforts to launch ad network

And Russia is the higher beta of the three big emerging markets, so it tends to do worse when everyone else is going down especially if oil is falling.

FORBES: HSBC's View On China

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)