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
  |  F2 h9 \. m) w' L# P7 Cto make-turtles
    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
" w" ^0 w( Y, I! J0 X      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
      create-initial-turtles num-open-min     "open-min"     blue
$ P( J+ r7 ~$ I- g5 e. c* X      create-initial-turtles num-open-min-max "open-min-max" orange ]
5 \! d! M& t3 E7 M  set-common-variables
: B. h+ L# W! }+ F7 s0 K# Nend

to create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
- b+ n, Z9 W* A) u, y  v4 t# Z  [ sprout 1
2 @9 h- n$ s+ ?' M    [ set rule turtle-rule
. w+ B: B3 w9 g" Q% Y4 |! D      set color turtle-color ] ]
end

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