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
! O# o) H  b( r0 zto make-turtles
    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
  a- U4 P. y. N6 B6 ^* d" g0 _9 p( G; U* L      create-initial-turtles num-random       "random"       brown
) m5 O+ h; P  p7 c3 u! e      create-initial-turtles num-random-away  "random-away"  pink
      create-initial-turtles num-open-min     "open-min"     blue
: S! b- e7 t/ B) d  J& ~8 N! l      create-initial-turtles num-open-min-max "open-min-max" orange ]
: K9 h5 e; T* `6 m. v5 M  set-common-variables
/ M, `  a0 t& h/ @; E+ m2 vend

to create-initial-turtles [n turtle-rule turtle-color]
1 R) N: Z% P& f2 h  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
  [ sprout 1
, g/ u+ i, O: v3 R3 O9 m2 d    [ set rule turtle-rule
      set color turtle-color ] ]
1 g2 `  h) w% T" e: f, Aend
" }( Y* t. q4 v! }8 h
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]