<http://schema.org/description>
"\u53D1\u56FE\u82E6\u624B\uFF0C\u603B\u662F\u4F1A\u6709\u91CD\u590D\u7684\uFF01\u901A\u8FC7iOS\u5BA2\u6237\u7AEF\u2026"^^<http://www.w3.org/2001/XMLSchema#string>
<https://catfan.me/delo/p317912>