Friday topic: they can be just held in one hand easily without any pain
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送交者: heartwaver 于 2011-03-23, 12:47:18:
回答: Apparently the two balls were no longer in their original place. 由 jxh 于 2011-03-23, 12:38:26:
or they can even be placed on a plate easily without any pain - unless the plate is too far away, say, 1 light-year away.
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