% Please add the following required packages to your document preamble:
% \usepackage{multirow}
\begin{table}[]
\centering
\caption{My caption}
\label{my-label}
\begin{tabular}{l|l|l|l|l|}
\cline{2-5}
                                                     & \multicolumn{2}{l|}{\textbf{Original}}  & \multicolumn{2}{l|}{\textbf{Transformed}} \\ \cline{2-5}
                                                     & Accuracy           & precision          & Accuracy            & precision           \\ \hline
\multicolumn{1}{|l|}{ACGC+cosine}                    & 0                  & 1                  & 4                   & 5                   \\ \hline
\multicolumn{1}{|l|}{\multirow{2}{*}{ACGC+learning}} & \multirow{2}{*}{2} & \multirow{2}{*}{3} & \multirow{2}{*}{6}  & \multirow{2}{*}{7}  \\
\multicolumn{1}{|l|}{}                               &                    &                    &                     &                     \\ \hline
\end{tabular}
\end{table}