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
6 F2 _+ |5 }" X9 Z' U    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
      create-initial-turtles num-open-min     "open-min"     blue
& ~- z' {9 t; }+ B" ]* c7 [      create-initial-turtles num-open-min-max "open-min-max" orange ]
' F# m' c# f  S4 P8 |. y  set-common-variables
: E" \$ q3 h) R! {# e. mend
# b  v, |/ I! x; `  p; ]+ f
+ F. N$ ]1 x5 qto create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
    [ set rule turtle-rule
      set color turtle-color ] ]
' e; o% }) U: W# z7 y, x7 j4 _end
. d2 e) y* N+ |, _
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]