语法看不懂，能帮忙解释一下吗？

etamina

下面的语句中ask patch和create-initial-turtles 后面接的[ ]中的语句是什么含义，其中非原语的都是定义的全局或者外部变量。语法有点奇怪，谁能帮我解释一下吗？多谢
to make-turtles
    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
% b% X1 |3 h( m5 v( h7 {/ X. i& f      create-initial-turtles num-open-min     "open-min"     blue
1 M6 ?1 ]% q/ B" E      create-initial-turtles num-open-min-max "open-min-max" orange ]
2 I8 k/ X, ]) d' G- ?/ o) f2 k  set-common-variables
5 G% Y2 I( _4 {  T" j; ]end

to create-initial-turtles [n turtle-rule turtle-color]
; k  \2 u+ G& g; z  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
9 ]/ J3 D' E7 U$ _4 p( z  [ sprout 1
    [ set rule turtle-rule
      set color turtle-color ] ]
end

[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]