\documentclass{scrartcl} \usepackage{threeparttable} \begin{document} \begin{table} \caption{Data inflation} \begin{threeparttable} \begin{tabular}{llp{20em}} \hline Unit\tnote{$\dagger$} & Size & What it means \\ \hline Bit (b) & 1 or 0 & Short for ``binary digit'', after the binary code (1 or 0) \\ Gigabyte (GB) & $2^{30}$ bytes & From ``giant'' in Greek. \\ Terabyte (TB) & $2^{40}$ bytes & From ``monster'' in Greek. \\ Petabyte (PB) & $2^{50}$ bytes & Google processes around 1PB every hour \\ Exabyte (EB) & $2^{60}$ bytes & \\ Zettabyte (ZB)\tnote{$\ddagger$} & $2^{70}$ bytes & The total amount of information in existence this year is forecast to be around 1.2ZB \\ Yottabyte (YB)\tnote{$\ddagger$} & $2^{80}$ bytes & Currently too big to imagine \\ \hline \end{tabular} \begin{tablenotes} \item[$\dagger$] The prefixes are set by an intergovernmental group, the International Bureau of Weights and Measures. \item[$\ddagger$] Yotta and Zetta were added in 1991; terms for larger amounts have yet to be established. \end{tablenotes} \end{threeparttable} \end{table} \end{document}
如果要為 longtable 加註解的話,必須多使用 threeparttablex 這個 package,例子請看 threeparttablex 的說明文件。
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