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
) N; X; u" ]% K: C3 f$ b9 f$ E& ~to make-turtles
( W0 @; @1 r) |2 I, M6 X& t    ask patch 0 0 [
+ f5 {/ r5 r- o      create-initial-turtles num-random-min   "random-min"   violet
+ R8 X$ f" s' j, t, T. u+ I# D  @2 d2 t      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
  Q2 A  F. m8 i: j" u$ P/ Y" t2 G. A      create-initial-turtles num-open-min     "open-min"     blue
% P1 ?. `8 P5 K- D; N# o* _      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
5 j5 ]6 r% ?$ c- Eend

& A  I2 |4 O  P" ?1 J: wto create-initial-turtles [n turtle-rule turtle-color]
  y# e% v# T" Q5 q' l0 y8 K  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
# S  A4 y7 e4 A7 E6 \  [ sprout 1
    [ set rule turtle-rule
      set color turtle-color ] ]
; c* b  A, [: R) f/ [+ t2 pend

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