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
to make-turtles
    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
      create-initial-turtles num-random       "random"       brown
! D( V8 j" a: g- Q      create-initial-turtles num-random-away  "random-away"  pink
7 X3 r6 [) p/ J% U      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
; z* V0 ~7 [8 y  k' N" ]$ p1 J0 c4 b$ }! r  set-common-variables
4 F' r7 Q: o$ h6 O3 \( @end
4 G4 w# i, N5 M
to create-initial-turtles [n turtle-rule turtle-color]
" z' G. k% c% ]+ ^/ |$ o  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
8 R+ B' g4 l% v8 y' B; R  [ sprout 1
    [ set rule turtle-rule
+ k7 `' A) x4 t; |- o) Z      set color turtle-color ] ]
$ B' r( Q6 Q& S- Q7 W3 {! X  Xend
, Y8 ^1 K+ E' h+ ~( ~3 W
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]