求翻译：自50年代末，公司从一个只能承建一座火力发电厂的小公司发展到如今能同时承担5至7坐2*600MW、2坐2*1000MW大型火力发电厂、十余座中小型电厂的大公司。是什么意思？

, The company from a small company of only the construction of a thermal power plant development since the late 1950s to the present can bear 5-7 sitting 2 * 600mw, 2 sit 2 * 1000mw large-scale thermal power plant, Shi Yuzuo small and medium-sized power plant large companies.

Since late 50s, the company from one can only undertake the building of a small company of the thermal power plants are able to take 5 to 7 and 2 * , 2 600 MW 2 * 1000 MW large power plants, more than 10 medium-sized power plants to the large companies.

From the end of the 50's, company's only could undertake construction a thermal power plant small company from one to develop until now can simultaneously undertake 5 to 7 to sit 2*600MW, 2 sits in the 2*1000MW large-scale thermal power plant, ten middle and small scale power plant big company.

Since the late 50, the company from a small company can build a thermal power plant development to the present as well as 5 to 7 sit 2*1000MW sit 2*600MW, 2 large thermal power plants, large firms more than more than 10 small and medium plant.

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