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
4 J9 y1 g  G( l0 z% }- R& Lto make-turtles
* E% z: P5 T) v5 W5 E    ask patch 0 0 [
+ a3 ]$ X! h  ~2 [% w- r      create-initial-turtles num-random-min   "random-min"   violet
& `+ }' O1 J* X4 F! {$ H3 |- T      create-initial-turtles num-random       "random"       brown
8 T1 `  j( p& Y0 n1 o8 k      create-initial-turtles num-random-away  "random-away"  pink
" N! A  p8 `$ N4 h# b" J  M      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
end

to create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
  r) P, }- q  }0 }8 ?% _7 w    [ set rule turtle-rule
      set color turtle-color ] ]
4 ?5 D5 x: |; q( F, ^8 f7 Q  Wend

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