目录1.函数定义2.构建图片URL3.检查图片是否存在：4.下载图片5.创建本地文件6.保存图片到本地7.完整代码总结1.函数定义
What is the $1? Is that the match found for (\\d+)? $line =~ /^(\\d+)\\s/; next if(!defined($1) ) ; $paperAnnot{开发者_运维技巧$1} = $line;
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