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
* s' n! H) Z& [- D& c) ^# Q, Q" |      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
5 W6 S' y( V6 r2 i  V) |) R      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
end
+ p! W! b' Q; o) v; O
to create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
3 t8 ^/ Z* x6 X7 g5 w' a    [ set rule turtle-rule
      set color turtle-color ] ]
6 M+ @& n# U( P& z; f  B7 H; Kend
+ x0 O- S) u' s
/ u; w0 u5 n% g3 F0 X. |/ J[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]