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
8 j. r1 U8 H& T- {to make-turtles
& W! A: [5 Z& J" n4 H  T    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
      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
( E2 u5 [9 E1 ]6 |, ]4 K& I      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
& f. A. N3 C9 P4 m4 hend
2 B- M( ^! H' V9 G5 E" @
to create-initial-turtles [n turtle-rule turtle-color]
7 g+ \; L7 e; Z" y4 x6 a4 ~: A9 N  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
1 N+ a. G( L6 Q9 q# T; Y  [ sprout 1
) \% z+ A" g0 M! t  a    [ set rule turtle-rule
      set color turtle-color ] ]
end
! u5 r/ K% ^! @4 ]: C
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]