<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>落水狗快跑</title><link>https://underdog-run.com/</link><description>文明里没有神坛，全是落水狗一路狂奔踩出的坑。</description><item><title>一种新的工具，究竟改变了什么？</title><link>https://underdog-run.com/posts/o001-what-does-a-new-tool-really-change/</link><guid>https://underdog-run.com/posts/o001-what-does-a-new-tool-really-change/</guid><pubDate>Sat, 25 Jul 2026 00:00:00 GMT</pubDate><description>人工智能让我开始思考的，并不是技术本身，而是另一个更久远的问题：当一种新的工具进入我们的生活时，它真正改变的，究竟是什么？</description></item><item><title>加减乘除符号的诞生</title><link>https://underdog-run.com/posts/v001-basic-arithmetic-operators/</link><guid>https://underdog-run.com/posts/v001-basic-arithmetic-operators/</guid><pubDate>Sat, 18 Jul 2026 00:00:00 GMT</pubDate><description>从古埃及到莱布尼茨，探索四个基础运算符号背后的故事，以及它们如何重塑了数学。</description></item></channel></rss>