\begin{table}%T2
%\centering
\par
\caption{
The 
definition of equivalent width ($EW$) for the molecular absorption 
bands.
The continuum level is linearly interpolated from the 
wavelength
region in the last column.
SiO molecules show three strong bands 
from 4.0--4.1~$\mu$m,
and \Ws~ is the total of these three 
bands.
}\label{table-def}
\begin{tabular}{llll}
\hline\hline
Name 
& Molecules  & Measured        & Continuum              \\
     &            
& region [$\mu$m] & [$\mu$m]               \\
\hline
\Wo  & HCN, \CtHt & 
2.97--3.35      & 2.94--2.97, 3.35--3.40 \\
\Wf  & HCN        & 3.56--3.58   
    & 3.51--3.56, 3.58--3.63 \\
\We  & \CtHt      & 3.60--4.00      & 
3.50--3.60, 4.00--4.10 \\
\hline
\Ws  & SiO        & 4.0025--4.0200  & 
3.95--3.96, 3.99--4.00 \\
     &            & 4.0425--4.0600  & 4.036--4.04  
           \\
     &            & 4.0825--4.1000  & 4.076--4.080           
\\
\hline
\end{tabular}
\end{table}