  We study the low energy dynamics of a single Dp-brane carrying sufcient large
number of D0-brane charges in type IIA theory. We assume the D-brane topology
to be $R \times \mathcal{M}_{2n} $ , where $\mathcal{M}_{2n}$ is a closed
manifold admitting a symplectic structure. We propose a new gauge fixing
condition which eliminates the spatial gauge fluctuations on the Dp-brane.
Using a conventional regularization method, one finds that the dynamics is
characterized by D0-brane matrix description when the density of D0-branes is
large enough. We also calculate the leading order interactions between two
D2-branes carrying both electric and magnetic fluxes in matrix theory.
