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
/ @7 ^0 v4 y6 _( xto make-turtles
# r% t6 ^7 K- H2 m    ask patch 0 0 [
1 s7 C& V9 V# N9 s3 \; [      create-initial-turtles num-random-min   "random-min"   violet
+ B( n9 M! Q- ]      create-initial-turtles num-random       "random"       brown
9 |6 C& f/ k( f- Q) f7 m      create-initial-turtles num-random-away  "random-away"  pink
      create-initial-turtles num-open-min     "open-min"     blue
2 M" v2 S- ~5 `: C: O9 O* K  _/ o      create-initial-turtles num-open-min-max "open-min-max" orange ]
) w& T5 U4 `4 `/ |% M  set-common-variables
2 o$ ^( x- o3 v) f1 Y9 Y+ ~end
6 U. y/ O; Q1 o4 y
1 P, ~* _: f. g( gto create-initial-turtles [n turtle-rule turtle-color]
, J( A" Y3 k8 M9 G: D( \  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
    [ set rule turtle-rule
      set color turtle-color ] ]
end
( h8 n) ^! ?! ?5 S! a
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]