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
$ j) I6 C1 w* \) h! {% M  _to make-turtles
    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
& z+ H7 ?9 M# R' g% G9 m      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
# q: d0 S/ E0 [$ K6 Y  l' i3 u8 U) i      create-initial-turtles num-open-min     "open-min"     blue
, N2 U" T$ ~8 d! t      create-initial-turtles num-open-min-max "open-min-max" orange ]
( r7 A1 I  }* t9 o2 Z5 W' Z  set-common-variables
4 ^1 y" C) [; I1 \8 T, ^end
3 b$ a$ n$ K, N+ A, |
to create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
) o7 v5 n8 r) [  [ sprout 1
  t) c+ Y% d5 w7 N/ ^0 L    [ set rule turtle-rule
; E( G6 E* v! |& O9 x& r      set color turtle-color ] ]
. V9 E+ s( o" U, f1 G# }: Fend

( Z+ J& K7 A, @[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]