文件粉碎工具：适用于粉碎密码文件和机密的escel表格等等，主要作用就是防止 别人用数据恢复大师把你刚删除的机密的文件恢复过来，造成密码丢失等。
I need your opinion about this code below. I have a list of messages: each message has a link that change the state
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