\begin{table}[h]
\centering
\small
\renewcommand{\arraystretch}{1.1} % 稍微加高行间距，更显精致
\setlength{\tabcolsep}{3.5pt}    % 调整列间距
% \begin{tabular}{lccccccc >{\columncolor[gray]{0.95}}c} % 为最后一列加底色突出
\begin{tabular}{lcccccccc}
\toprule
\textbf{Pair} & \textbf{M1} & \textbf{M2} & \textbf{M3} & \textbf{M4} & \textbf{M5} & \textbf{M6} & \textbf{M7} & \textbf{Number} \\
\midrule
\rowcolor[gray]{0.95} % 斑马纹底色
eng-lap  &           &           &           & \checkmark & \checkmark &           &           & 2 \\
eng-res  &           &           &           & \checkmark &           & \checkmark &           & 2 \\
\rowcolor[gray]{0.95}
jpn-fin  & \checkmark &           & \checkmark & \checkmark &           &           & \checkmark & 4 \\
jpn-hot  &           &           & \checkmark &           &           & \checkmark & \checkmark & 3 \\
\rowcolor[gray]{0.95}
rus-res  & \checkmark &           &           &           & \checkmark &           &           & 2 \\
tat-res  &           & \checkmark &           & \checkmark &           &           & \checkmark & 3 \\
\rowcolor[gray]{0.95}
ukr-res  & \checkmark &           &           &           & \checkmark &           &           & 2 \\
zho-fin  & \checkmark &           &           & \checkmark &           &           & \checkmark & 3 \\
\rowcolor[gray]{0.95}
zho-lap  & \checkmark &           &           &           & \checkmark & \checkmark & \checkmark & 4 \\
zho-res  &           & \checkmark & \checkmark &           &           &           & \checkmark & 3 \\
\bottomrule
\end{tabular}
\caption{Selected ensemble configurations for each language--domain pair. \checkmark~indicates that the corresponding candidate model is included in the final ensemble.}
\label{tab:ensemble_config_pair}
\end{table}