Over a million volunteers took part in the servicing of the

Over a million volunteers took part in the servicing of the Olympic Games.
这句话的意思是：超过一百万名志愿者参与了奥运会的服务工作.那为什么不用service?我查到的servicing的意思是维修,还是这个servicing是service的变形,如果是那这是什么用法?