我使用了以下代码：
\documentclass[10pt,smallroyalvopaper,oldfontcommands]{memoir}
\usepackage{bm,amsfonts,amsmath,amssymb,calc,color,times,ragged2e,makeidx,natbib,xpatch}
\usepackage[framemethod=TikZ]{mdframed}
\usepackage[within=chapter]{newfloat}
\usepackage[hang]{footmisc}
\usepackage{algorithmic,comment}
\usepackage[mathscr]{eucal}
\usepackage{wasysym}
\usepackage{booktabs,threeparttable}
\usepackage{mathtools,nccmath}
\usepackage{MnSymbol}
\usepackage{rotating}
\usepackage{array}
\usepackage{multicol}
\usepackage{anyfontsize} %% used to tweak fonts in url command
\usepackage{refcount}
\usepackage{footnote}
\usepackage{longtable}
\usepackage{sidecap}
\usepackage{enumitem}
\usepackage{flushend}
\begin{document}
\newcommand\appshrink{\vspace{-10pt}}
\newcommand{\km}{\mbox{\,km}}
\newcommand{\dy}{\mbox{\,d}}
\newcommand{\gn}{\ensuremath{\,\mathbb{G}}}
\newcommand{\mmoon}{M_{\!\!\rightmoon}}
\newcommand{\kg}{\mbox{\,kg}}
\newcommand{\mearth}{M_\oplus}
\newcommand{\rmoon}{R_{\!\!\rightmoon}}
\newcommand{\au}{\,\mbox{au}}
\newcommand{\yr}{\mbox{\,yr}}
\newcommand{\msun}{M_\odot}
\newcommand{\half}{\tfrac{1}{2}}
\subsubsection*{Moon}
\appshrink
\begin{savenotes}
\begin{center}
\begin{longtable}{lrl}
semimajor axis&$a=$&$384\,400\km$ \\
eccentricity&$e=$&$0.0549$ \\
inclination&$I=$&$5.15^\circ$ \\
orbital period&$P=$&$27.322\dy$ \\
mass parameter\footnote{\label{foot:grail}\cite{will14}.}&$\gn \mmoon=$&$4.902\,80\times
10^{12}\mbox{\,m}^3\mbox{\,s}^{-2}$ \\
mass&$\mmoon=$&$7.345\,79/g\times 10^{22}\kg$\\
Earth/Moon mass ratio&$\mearth/\mmoon=$ &$81.3005$ \\
spin period&$P_s=$&$27.322\dy$\\
obliquity&$\epsilon=$&$6.68^\circ$ \\
moment of inertia\footnotemark[\getrefnumber{foot:grail}]&$C/(\mmoon\rmoon^2)=$&$0.392\,73$ \\
quadrupole moment&$J_2=$&$0.000\,203\,22$ \\
gravitational Love number\footnotemark[\getrefnumber{foot:grail}]&$k_2=$&$0.0242(2)$ \\
displacement Love number\footnotemark[\getrefnumber{foot:grail}]&$h_2=$&$0.0424(1)$ \\
mean
radius\footnotemark[\getrefnumber{foot:grail}]&$\overline R=$&$1\,737.15\km$ \\
reference radius&$\rmoon=$&$1\,738\km$
\end{longtable}
\end{center}
\end{savenotes}
\appshrink
\appshrink
\appshrink
\subsubsection*{Mars}
\appshrink
\begin{savenotes}
\begin{center}
\begin{longtable}{lrl}
semimajor axis&$a=$&$1.523\,71\au$ \\
eccentricity&$e=$&$0.093\,39$ \\
inclination&$I=$&$1.85^\circ$ \\
orbital period&$P=$&$686.980\dy=1.880\,85\yr$ \\
mass parameter\footnote{\label{foot:genova16}\cite{genova16}.}&$\gn M=$&$4.282\,84\times 10^{13}\mbox{\,m}^3\mbox{\,s}^{-2}$ \\
mass&$M=$&$6.416\,91/g\times 10^{23}\kg$ \\
Sun/planet mass ratio&$\msun/M=$&$3.098\,71\times10^6$\\
spin period& $P_s=$&$1.025\,96\dy$ \\
obliquity&$\epsilon=$&$25.19^\circ$ \\
moments of inertia\footnotemark[\getrefnumber{foot:genova16}]\footnote{\cite{kon11}.}
&$C/(MR_\mathrm{p}^2)=$&$0.3644(5)$ \\
\multicolumn{2}{r}{$J_2=[C-\half(A+B)]/(MR_\mathrm{p}^2)=$}&
$0.001\,956\,61$ \\
\multicolumn{2}{r}{$(B-A)/(MR_\mathrm{p}^2)=$}& $0.000\,252\,43$ \\
%% see old paper by Bills and James (1999) for normalization
gravitational Love number\footnotemark[\getrefnumber{foot:genova16}]&
$k_2=$&$0.170(1)$ \\
equatorial radius\footnotemark[\getrefnumber{foot:arch}]&$R_\mathrm{eq}=$&$3\,396.2\km$ \\
polar radius\footnotemark[\getrefnumber{foot:arch}]&$R_\mathrm{pol}=$&$3\,376\km$ \\
reference radius&$R_\mathrm{p}=$&$3\,396\km$
\end{longtable}
\end{center}
\end{savenotes}
\end{document}
它编译时没有错误，但是脚注2没有3出现在第一页。
答案1
（从上面的评论中复制。）savenotes 环境，顾名思义，会“保存”其中的所有脚注，直到环境完成，然后在那里打印它们，因此脚注直到长表结束后才会被打印。