roll (something) out
phrasal verb with roll verb uk/rəʊl/ us/roʊl/
推出（新产品、服务等）;实行（新制度）;开展
to make a new product, service, or system available for the first time
The government plans to roll out a series of tax cuts over the next few years. 政府计划在未来几年中推出一系列的减税措施。