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. 7 |" [2 c: v: f! X+ R2 Z
公仔箱論壇: h7 n) g0 S# e1 S3 h
the possibiolity is endless which will make it impossible to repeat the experiment. |