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
' n  o0 N: U3 J) ]: j( {- ?      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
      create-initial-turtles num-open-min     "open-min"     blue
% s) ?- y  c& v% }      create-initial-turtles num-open-min-max "open-min-max" orange ]
: w3 D1 m) f* C7 H  set-common-variables
end
9 Q7 K4 q9 q: f8 E3 G) g& _
to create-initial-turtles [n turtle-rule turtle-color]
2 I( G6 C! `% h/ C  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
    [ set rule turtle-rule
8 W3 ~, r. i+ W6 V/ s! `      set color turtle-color ] ]
3 t9 {( K/ t7 ?& rend
, j0 y3 [* f: k9 s8 g
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]