![定义“Macron below”/将低线(U + 0332)组合为 Unicode 字符以在文本下划线](https://linux22.com/image/480654/%E5%AE%9A%E4%B9%89%E2%80%9CMacron%20below%E2%80%9D%2F%E5%B0%86%E4%BD%8E%E7%BA%BF%EF%BC%88U%20%2B%200332%EF%BC%89%E7%BB%84%E5%90%88%E4%B8%BA%20Unicode%20%E5%AD%97%E7%AC%A6%E4%BB%A5%E5%9C%A8%E6%96%87%E6%9C%AC%E4%B8%8B%E5%88%92%E7%BA%BF.png)
考虑以下内容(使用 xelatex 编译):
\documentclass{article}
\usepackage{fontspec}
\usepackage[verbose]{newunicodechar}
% List of symbols supported by Symbola at
% https://www.fileformat.info/info/unicode/font/symbola/list.htm
\newfontfamily\sym{Symbola}
\DeclareTextFontCommand{\symb}{\sym}
\newunicodechar{