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
% E. W3 _  o& R, f) P' u) rto make-turtles
2 J: z7 d+ Z3 V( K+ I- v' J    ask patch 0 0 [
# r# m0 b7 r7 C: E. f5 V6 C      create-initial-turtles num-random-min   "random-min"   violet
      create-initial-turtles num-random       "random"       brown
$ K& {3 V) L% X  {+ J  r1 R      create-initial-turtles num-random-away  "random-away"  pink
      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
5 k' Z% ]1 t7 g4 b- [. S7 Rend
2 z( z+ I/ w3 `7 P; A. c% ~# ~* N
, r1 J* x4 ?! ?. }" K# `to create-initial-turtles [n turtle-rule turtle-color]
) s6 c+ n4 {" g/ n! g" W" b  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
# k$ x' l# q1 Z# {; J7 g- V  [ sprout 1
2 a# ^/ K0 U$ I; y3 c  j    [ set rule turtle-rule
& g% o. x+ k* y" x1 i      set color turtle-color ] ]
end

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