for the glass fragment to strike her, the glass has to be smash at a precise speed and precise angle with a precise orientation, and possibly if the glass has any pre-existing defect. + a! L- G( m( P3 `' W# \' @% r
, _4 D9 t% G) p# t6 r- xthe possibiolity is endless which will make it impossible to repeat the experiment. |
發表於 2011-6-24 09:56 AM
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發表於 2011-6-24 08:23 PM
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