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
$ h; |* G" N2 ~- R6 }6 O) s. V: wto make-turtles
    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
# m5 c0 x7 |; d0 U      create-initial-turtles num-random       "random"       brown
2 [4 Z" k+ s0 f/ N3 E& E      create-initial-turtles num-random-away  "random-away"  pink
6 B4 ^; }4 A5 ~0 y      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
4 j$ q9 k2 g1 T. u$ Y! R# @  set-common-variables
end
7 |7 _& g4 l$ V3 H! g& w+ d9 [
4 m. z* q; m& o# ?8 Ito create-initial-turtles [n turtle-rule turtle-color]
8 R/ ~, A) n9 ~" r% R  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
    [ set rule turtle-rule
6 A. x8 i  `8 P$ Q0 ?8 _7 z      set color turtle-color ] ]
end

4 X# g3 S4 I( G- E& _7 k) N$ v[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]