Integrate glossary across website

It would be great if pages across the website could refer to the glossary, so that specialised terms could be explained in popups.

Consult with @debruine who built a bookdown glossary plugin that might be very helpful here.

首先查看网站页面目前如何呈现专业术语，并就 bookdown glossary plugin 咨询 @debruine。当网站中相关术语可以通过选中或悬停来在弹出窗口中显示解释时，工作即告完成。

由索引模型根据 Issue 内容生成。