By default, latex sets the_ “As a part of the subscript representation in the mathematical model, this kind of processing is very unpleasant in many cases, such as the underlined variable: host in the code_ Name or something. Although you can use “host”\_ “Name” and so on, but it’s not easy to read. The following method can deal with most problems.

If not, please refer to http://www.tex.ac.uk/cgi-bin/texfaq2html?label=underscore

%%%%%%%Handling underlines._%%%%%%%%%
\usepackage{underscore}
%%%%%%%Handling underlines._%%%%%%%%%