https://blog.wongcw.com/2022/05/26/azure-translator%e6%96%87%e6%aa%94%e7%bf%bb%e8%ad%af%e5%8a%9f%e8%83%bd%e7%8f%be%e5%8f%af%e6%8e%83%e6%8f%8f%e5%92%8c%e7%bf%bb%e8%ad%afpdf-%e6%96%87%e6%aa%94/