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
9 Y" Y8 B$ W$ j' Z1 s: Rto make-turtles
: ]% m+ ?2 E$ {& K1 H    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
      create-initial-turtles num-random       "random"       brown
: W" o9 _6 I" j+ j      create-initial-turtles num-random-away  "random-away"  pink
- L# V+ I, s- H1 @  T      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
$ S$ H! s& C& _+ W  set-common-variables
end
. }  u) h# @- Y, N! |& r
to create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
) N. q3 c/ e) t2 s6 c4 `# g0 f  [ sprout 1
$ L  T/ f- ^/ \7 {0 O# Z; U    [ set rule turtle-rule
  }& I, L3 p; X8 a5 {  y/ Z      set color turtle-color ] ]
8 ]3 g7 G) H' i# M% M) @end

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