They will orbit together for 12 days before the Shenzhou 8 returns to earth.

他们将一起在轨道运行12天，之后“神舟8号”将返回地面。

youdao

When that time is up, Shenzhou 8 will unhook itself again, this time for good.

这之后，神舟八号将再次与天宫脱离，这次是永久脱离。

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Shenzhou 8 spent just under 17 days in orbit in total, the longest Shenzhou mission to date.

神舟8号飞船在轨道上运行的总时间还不足17天，是迄今为止历时最长的神舟飞行任务。

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Assuming the Shenzhou 8 venture goes well, two manned missions (Shenzhou 9 and 10) should follow in 2012.

BBC: Rocket launches Chinese space lab

Then, in a few weeks' time, China will launch another unmanned spacecraft, Shenzhou 8, and try to link the pair together.

BBC: China ready for next space leap

After the second docking was completed, Shenzhou-8 separated again from Tiangong-1 and then returned to Earth.

FORBES: Chinese Docking Mission A Success; Shenzhou-8 Returned To Earth