这些疼痛从何而来呢？根据德国教授康格里的说法，这种疼痛来自于以一种不寻常的方式拉扯肌肉。

Where do these pains come from? According to a German professor Kangri, the soreness comes from straining your muscles in an uncommon way.

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但是这些疼痛从何而来呢？根据德国教授康格里的说法，这种疼痛来自于以一种不寻常的方式拉伸你的肌肉。

But where do these pains come from? According to a German professor Kangri, the soreness comes from straining your muscles in an uncommon way.

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到2010年，航天飞机将退役，被宇航员探险飞行器取代。但这一计划在2012年之前很难实现，可能要推迟到2014年，主要取决于资金问题，格里芬说。

The crew exploration vehicle would replace the space shuttle, due to be retired in 2010, but not before 2012 and possibly as late as 2014 depending on the money available, Griffin said.

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