並前往https://jingyuexing.github.io/Ebook/Physics/%E5%8D%8A%E5%AF%BC%E4%BD%93%E7%89%A9%E7%90%86(%E7%AC%AC7%E7%89%88)-%E5%88%98%E6%81%A9%E7%A7%91,%20%E7%94%B5%E5%AD%90%E5%B7%A5%E4%B8%9A%E5%87%BA%E7%89%88%E7%A4%BE,%202008.pdf