\begin{table}%t4
%\centering
\par
\caption{\label{solar}Mass fractions of several elements yielded by the
  Fran\c{c}ois et~al. (\cite{Francois2004}) model and the delay model at the galactic
  age of 9.5 Gyr compared to the solar values of Asplund et~al. (\cite{Asplund2005}).}
\small
\begin{tabular}{c|c|ccccc}
  \hline\hline
  & $X_{\odot {\rm oss}} $ &\multicolumn{5}{c}{ $X_{\odot {\rm th}} $}\\
  \hline
%\noalign{\smallskip}
    & Asplund et~al. (\cite{Asplund2005}) &Fran\c{c}ois et~al. (\cite{Francois2004})  &0.1 Gyr &0.2 Gyr &0.5 Gyr &1 Gyr \\ 
  \hline
  He  &   $2.55 \times 10^{-1}$ & $2.52 \times 10^{-1}$&  $2.52 \times 10^{-1}$  &  $2.52 \times 10^{-1}$ &$2.52 \times 10^{-1}$  &$2.52 \times 10^{-1}$  \\
%   &  &  & & & &\\ 
  C  & $2.21 \times 10^{-3}$   & $2.03 \times 10^{-3}$&$2.05 \times 10^{-3}$ &$2.06 \times 10^{-3}$ &$2.11 \times 10^{-3}$ & $2.17 \times 10^{-3}$ \\
%    &  &  & & & &\\ 
     N  &    $6.32 \times 10^{-4}$  & $9.73 \times 10^{-4}$ &$9.75 \times 10^{-4}$ &$9.77 \times 10^{-4}$ &$9.81 \times 10^{-4}$ &$9.85 \times 10^{-4}$\\
%    &  & & & & & \\ 
  O  & $5.48 \times 10^{-3}$    & $5.27 \times 10^{-3}$ & $5.31 \times 10^{-3}$ & $5.35 \times 10^{-3}$ & $5.46 \times 10^{-3}$ & $5.62 \times 10^{-3}$ \\
%    &  &  & & & &\\ 
\par
  Mg  & $6.17  \times 10^{-4}$   &$6.66 \times 10^{-4}$ &$6.70 \times 10^{-4}$ &$6.74 \times 10^{-4}$ & $6.86 \times 10^{-4}$& $7.03 \times 10^{-4}$\\
%    &  &  & & & &\\ 
\par
  Si  &  $6.80\times 10^{-4}$   &$8.14 \times 10^{-4}$ &$8.17 \times 10^{-4}$ &$8.20 \times 10^{-4}$ &$8.30 \times 10^{-4}$ &$8.43 \times 10^{-4}$ \\
%    &  &  & & & &\\ 
 S  &  $3.31 \times 10^{-4}$   & $3.95\times 10^{-4}$ & $3.97\times 10^{-4}$ & $3.98\times 10^{-4}$ &$4.03\times 10^{-4}$ &$4.09\times 10^{-4}$\\
%    &  & & & & &\\ 
  Ca  &  $6.13 \times 10^{-5}$    & $5.40 \times 10^{-5}$ &$5.42 \times 10^{-5}$ &$5.44 \times 10^{-5}$ &$5.50 \times 10^{-5}$ &$5.58 \times 10^{-5}$ \\
%    &  &  & & & &\\ 
 Fe  & $ 1.18  \times 10^{-3}$  &  $1.14 \times 10^{-3}$ & $1.15 \times 10^{-3}$ &$1.15 \times 10^{-3}$ &$1.15 \times 10^{-3}$ &$1.16 \times 10^{-3}$\\
%    &  &  & & & &\\ 
 \hline
 \end{tabular}
\end{table}