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一个疑惑多年的问题：指甲划黑板的声音，为什么听起来那么闹心？
指甲划黑板的声音，为什么听起来那么闹心？
这个现象不一般5/15
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App02:48指甲划黑板的声音，为什么听起来那么闹心？
App02:27App02:44App02:42App02:49App03:00App03:06App02:48App02:53App02:24App03:04App02:49App02:17App02:38App02:29App02:48
