Before revision:  Spectra of networks having modular structure show distinguishable different features than the random networks. For a very well distinguished community structure (rewiring probability p_r \sim 0) , the whole spectra is localized except some of eigenstates at boundary .
After revision:  Moreover, for a very well distinguished community structure (rewiring probability p_r \sim 0) , the whole spectra is localized except some of eigenstates at boundary .