https://blog.wongcw.com/2022/01/29/%e7%82%ba%e4%bb%80%e9%ba%bc%e5%86%ac%e5%a5%a7%e6%9c%83%e8%a6%81%e7%94%a8%e4%ba%ba%e9%80%a0%e9%9b%aa%ef%bc%9f/
為什麼冬奧會要用人造雪?