<<< native [ EArray [ AlignCenter , AlignCenter ] [ [ [ ESymbol Accent "\8592" ] , [ ENumber "1" ] ] , [ [ EText TextNormal "a long cell" ] , [ ENumber "1" ] ] ] ] >>> mml $$\begin{array}{cc}\hfill \leftarrow \hfill & \hfill 1\hfill \\ \hfill \mathrm{\text{a long cell}}\hfill & \hfill 1\hfill \end{array}$$