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
, M& }( ]* I9 Z2 F' k) L      create-initial-turtles num-random       "random"       brown
, t2 O) W" J8 I+ n& c8 N) g! M      create-initial-turtles num-random-away  "random-away"  pink
% l# O! U6 j6 O' m$ B' v      create-initial-turtles num-open-min     "open-min"     blue
) ?: q2 C+ P4 `      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
end
$ A% O/ a: j3 ?, V2 `3 n
to create-initial-turtles [n turtle-rule turtle-color]
) E% R! q: b: M, A  }  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
9 z' E. E& h: t( o$ R3 p$ v  [ sprout 1
    [ set rule turtle-rule
      set color turtle-color ] ]
' o6 B6 S2 U* B$ d( ?( i# q" aend

: r# U5 ~. j& n[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]