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 |# o8 k' D4 Q# }6 j  a  P    ask patch 0 0 [
* L) N, [4 Y- p' s, e2 U$ k      create-initial-turtles num-random-min   "random-min"   violet
% i) M. X  Q  R: w% j8 A      create-initial-turtles num-random       "random"       brown
+ z' o1 y0 B) ?! ^! ^      create-initial-turtles num-random-away  "random-away"  pink
      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
% ^5 X; V0 M- g% J  set-common-variables
end
5 T7 v- S* G: A4 T8 U$ l1 |+ E
to create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
6 e+ c4 J" W' P! E% \- |  [ sprout 1
* ]- p/ P; I9 U( z  N5 D    [ set rule turtle-rule
      set color turtle-color ] ]
end

8 x# |, }* `4 r0 w* e[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]