求翻译：1980年电通集团在北京设立事务所发展至今，已经形成了拥有广告代理、公关、数码、促销及调研在内的中国规模最大、最完整的整合服务体系。截止2010年4月，电通中国集团的员工已扩大至1500人。是什么意思？

1980 Dentsu Group was established in Beijing office development so far, has been formed with advertising agencies, public relations, digital, promotion and research, including the largest, most complete system integration services. As of April 2010, the Dentsu Group's staff has been expanded to 1,50

正在翻译，请等待...

In 1980 the electricity passed the group to set up the office development in Beijing until now, already forms had the advertisement proxy, the public relations, digital, the promotion and the investigation and study Chinese scale is biggest, the most complete conformity service system.Cuts off in Ap

1980 Dentsu Group set up offices in Beijing now has been formed with advertising agency, public relations, digital, promotion and research in China, the largest and most complete system integration services. As of April 2010, Dentsu Group's staff has been expanded to 1500 people in China.