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
4 l) A" O% g1 c( l! t* R    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
      create-initial-turtles num-random       "random"       brown
- P! y. R0 |1 Z' J. s: A& p      create-initial-turtles num-random-away  "random-away"  pink
2 w+ d3 j1 z* h. |/ X/ d: A      create-initial-turtles num-open-min     "open-min"     blue
% J" @/ B* L9 G% P  T% }% E& y      create-initial-turtles num-open-min-max "open-min-max" orange ]
) E; E+ J6 v- f& ^) y  set-common-variables
4 {$ v0 o7 |! C7 d1 f9 J9 p' rend
2 H8 t1 Y# w1 E1 X  `) ]
0 v6 A6 }% ^- g) Rto create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
9 D  F5 ?: [3 ?" B, k) }" w- X  [ sprout 1
    [ set rule turtle-rule
      set color turtle-color ] ]
end

  O) L7 ~$ B3 \; U[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]