買的視頻里結尾沒有運行。到保存就沒了。

自己做的時候老是出現這種錯誤：

The elements contained in element set ErrElemExcessDistortion-Step1 have distorted excessively.

The elements in element set ErrElemZeroALEMass-Step1 have zero or negative mass.

Print-out suppressed for subsequent distorted elements

There are a total of       195 excessively distorted elements.

運行出來大約就是這樣的。