Meanwhile, it is shown that two-dimensional element method is very suitable for the stability calculation of jointed rocky slope.

However, if the list is two-dimensional (that is, each element is itself a list), then you often want to "unpack" the contents of each nested list as it is iterated. You could do that like so.

Based on image processing technology, a method of geometric modeling is presented for two dimensional finite element analysis of asphalt mixture.