Since it is the first spacewalk for China... there are many uncertainties.

这是中国第一次在太空行走……有许多的不确定因素。

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This is the first spacewalk for the Endeavour crew that will also install other equipment they brought from earth.

这是奋进号航天飞机机组人员第一次太空作业，他们将安装更多从地球带去的设备。

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Spacewalker John D. Olivas gathers tools during the first spacewalk of the mission in this view from NASA TV June 11, 2007.

2007年6月11日，宇航员John D. Olivas在太空舱外回收工具，这也是首次被在航天署频道上播放的太空行走任务。

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The first part of the spacewalk was to replace the three RSUs, each of which contains two gyroscopes.

BBC: Hubble gyros fixed after struggle

Monday's spacewalk was the first of two excursions by the station's crew this month.

MSN: Spacewalker tosses out real-life 'Spaceball' - Technology & science - Space - Space.com | NBC News

Mr Jing, 46, is making his second spaceflight after participating in the Shenzhou-7 outing in 2008 - the mission that included China's first spacewalk.

BBC: China launches space mission with first woman astronaut