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这个是netlogo自带模型库里的模型中的程序,我新建文件再将其输入却提示错误:( P1 ?% V7 D) y# D
error while observer running SET-DEFAULT-SHAPE in procedure SETUP& r) N1 h9 `, W: p
"dog" is not a currently defined turtle shape$ _: x$ Y- n( o$ U1 H% e
(halted running of setup); A0 E* w* C& G: A# w ~! f