\begin{table}%t1
%\centering
\par
\caption{Parameters at different evolutionary points a, b, c, d, e,
and f in sequences of cases 1 and 2.} \label{tab1}
%\begin{flushleft}
\small
\begin{tabular}{ccccccccccccc} \hline\hline   Sequence &
 Time  & $P$ & $M _{1} $ & $M _{2} $ & $\log L_{1}/L_{\odot}$ & $\log
T_{\rm 1,eff}$ &$\log L_{2}/L_{\odot}$ & $\log T_{\rm 2,eff}$ & $Y_{1}(c)$ &
$Y_{1}$ &
$V_{\rm rot,1}$ & $V_{\rm rot,2}$\\
\par
 & $10^{7}$~yr & day & $M_{\odot}$ & $M_{\odot}$ &  &  &  &
 & &  &  km~s$^{-1}$  & km~s$^{-1}$\\
\par
\hline
\par
 a  &        &       &       &       &       &       &        &        &         &        &      &   \\
Case 1 & 0.0000 & 2.777 & 9.000 & 6.000 & 3.639 & 4.385 &3.077& 4.287& 0.2800  & 0.2800 &     &    \\
Case 2& 0.0000 & 2.776 & 9.000 & 6.000 & 3.629 & 4.381 &3.055  &
4.280  & 0.2800 & 0.2800 & 68.66  & 56.39\\ \hline
 b  &        &       &       &       &       &       &       &        &         &        &       &  \\
Case 1& 2.6725 & 2.737& 8.929& 5.994  & 3.959 & 4.285 &  3.110 & 4.267 & 0.8744 & 0.2800 &        & \\
Case 2& 2.6267 & 2.743 & 8.939 & 5.995  &  3.914& 4.295 &  3.085&
 4.265& 0.8247 & 0.2800 & 143.69 & 63.39\\ \hline
 c  &        &       &       &       &       &       &       &        &         &        &       &  \\
Case 1& 2.6854& 3.190 & 5.314& 9.608& 3.457&  4.120 & 3.811& 4.396 &  0.8799&  0.2801 &       &  \\
Case 2& 2.6329 & 3.192 &5.318& 9.616 & 3.264& 4.135 &3.834& 4.406&
0.8267& 0.2801 & 121.81 &  67.59\\ \hline
 d  &        &       &       &       &       &       &       &        &         &        &        & \\
Case 1& 3.0784 & 11.743& 2.727 & 12.168& 3.776&4.128 & 4.145 &4.461& 0.9800 &0.5892 &       &  \\
Case 2& 3.3567 & 7.213 & 3.388 & 11.497& 3.442 &4.162& 4.123&4.405
&0.9800 & 0.3481 &58.41& 41.79\\ \hline
\par
e  &        &       &       &       &       &       &       &        &         &        &        & \\
Case 1& 3.0941 & 32.534& 1.797 & 13.082& 3.959& 4.028 & 4.276&4.539 &  0.9799 &0.8775 &       &  \\
Case 2    & &  & & &  &&  &   & &  & & \\ \hline
\par
f  &        &       &       &       &       &       &       &        &         &        &        & \\
Case 1& 3.1484& 42.382& 1.572 & 13.245&3.186 &4.775 & 4.308& 4.549 & 0.8856& 0.8793&        & \\
Case 2& 3.5470& 32.531& 1.714& 13.037& 3.280& 4.686& 4.308&
4.419&0.9800 & 0.8261 & 0.97 &10.74 \\ \hline
\end{tabular}
\end{table}