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
% G3 e: ?. G* I0 lto make-turtles
    ask patch 0 0 [
% Y" k9 I. r3 i3 b) M      create-initial-turtles num-random-min   "random-min"   violet
+ c9 a9 L9 S6 c2 v8 `      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
' E! N/ w3 G' y      create-initial-turtles num-open-min-max "open-min-max" orange ]
) N" e# B9 z+ j$ f) x, a$ D9 R  set-common-variables
end
& O& G6 f2 o$ O! q# A
to create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
' d0 M' X2 @' {0 }1 f  [ sprout 1
4 {' p' r" Y* }$ ^    [ set rule turtle-rule
0 n4 M+ ]# F  d5 ?0 _      set color turtle-color ] ]
5 v3 p+ Q1 u7 c5 nend
. q4 A" z$ N+ B# c. N5 f' \
5 p2 b/ Q" r# ~5 ?+ q+ W2 W8 D[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]