英语翻译Many emerging market equity indices have relatively larg

英语翻译
Many emerging market equity indices have relatively large shares in the energy,materials and industrial sectors,in part because of the relatively high shares of industry in many emerging economies.
许多新兴市场股票指针有相对较大的股票在能源、材料和工业领域,一部分是因为相对较高的行业的股票在许多新兴经济体。
这样翻译 我还是没明白。到底是因为什么新兴市场的股票占有很大部分？