如何让latex中插入没有标号的footnote

方法一

 \let\thefootnote\relax\footnotetext{http://www.robots.ox.ac.uk/~vgg/research/affine/}

方法二

\documentclass{article}
\usepackage{lipsum}

\newcommand\blfootnote[1]{%
  \begingroup
  \renewcommand\thefootnote{}\footnote{#1}%
  \addtocounter{footnote}{-1}%
  \endgroup
}

\begin{document}

Some text\blfootnote{A footnote witout marker} and some more text\footnote{A standard footnote}

\end{document}