\begin{table}%t4
\caption{The bysector linear regression analysis.}\label{tabreg}
%\centering
\par
\begin{tabular}{lcc}
\hline
\hline
Regression & $R$ & see Fig.\\
\hline
$(B-V)_{{\rm syn}}=1.141\pm0.027 \times (B-V)_T -0.156\pm 0.017$ & 0.86 &\ref{compBV}\\ 
$(B-R)_{{\rm syn}}=1.593\pm0.052 \times (B-V)_T -0.062\pm0.033$&0.78&\ref{B-V_B-R}\\
${\rm H_\alpha+[NII1]+[NII2]}=0.575\pm0.052 \times \log(L_V/L_\odot) -5.922\pm0.206$ &0.58&\ref{Hacorr}\\
${\rm H_\alpha+[NII1]+[NII2]} (sp) =1.189\pm0.054 \times {\rm H_\alpha+[NII1]+[NII2]} (ph) -0.322\pm0.057$ &0.75&\ref{compHa}\\
Mg$_2=0.095\pm0.009 \times \log(L_V/L_\odot)-0.701\pm0.043$ & 0.71&\ref{V_Mg2}\\
${\rm NaD}=17.031\pm0.975\times {\rm Mg}_2-0.660\pm0.221$ &0.74&\ref{Mg2_NaD}\\
${\rm H}_\beta=-8.707\pm1.206 \times {\rm Mg}_2+4.045\pm0.218$&--0.54&\ref{Mg2_Hbeta}\\
G$_{4300}=20.365\pm2.406 \times {\rm Mg}_2+0.227\pm0.446$&0.60&\ref{Mg2_Gband}\\
$\Delta_{4000}=2.266\pm0.206 \times {\rm Mg}_2+0.040\pm0.040$&0.69&\ref{Mg2_delta}\\
\hline
\end{tabular}
\end{table}