求翻译：原公司主要业务有各种媒体广告投放以及为企业提供市场行销和品牌传播策略的策划。在公司任总经理助理和媒介经理职务，协调公司内部各级之间的关系。处理公司和各种媒体之间的关系，负责媒体购买、谈判等工作（公司买断省级电视台栏目广告），以及洽谈客户，为客户策划品牌推广及市场行销方案。是什么意思？

Original company main business includes advertising as well as a variety of media to provide marketing and brand communication strategy planning. In the company as Assistant General Manager and Media Manager, relationship between the coordination at all levels within the company. Dealing with relationships between companies and a variety of media, media buying, negotiations and other work (column advertising company bought provincial TV stations), as well as negotiate customer, brand promotion and marketing scheme proposed to customer.