{"type":"rich","version":"1.0","title":"Scarlett wrote","author_name":"Scarlett (npub17e…38tsx)","author_url":"https://yabu.me/npub17eydjgu2g4quzq297ywc2vk99yyfh73rcqturw2echpxmqsd0wus738tsx","provider_name":"njump","provider_url":"https://yabu.me","html":"美国普通人群数学很差。美国的精英群体数学比较厉害。普通美国人数学非常差。非洲人的数学更差。\n中国人的数学比较好。"}