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
3 B4 h! x& F* i8 ?' R3 jto make-turtles
2 r7 ?& i; Z8 g    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
      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
% u+ i- i6 f' q8 O      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
end
4 a. [7 T' `+ x; Z. L+ x3 V8 C0 m
+ Y3 }5 m/ ?. B7 Q( \6 A) [to create-initial-turtles [n turtle-rule turtle-color]
' T6 b9 |& x" Q  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
% {# g+ z% W! Y    [ set rule turtle-rule
8 ?' S7 H3 ]  D      set color turtle-color ] ]
end

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