以前，我作为志愿者多次参加了该活动的服务工作的翻译：Before, I worked as a volunteer has participated in the active services 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Previously, I have participated as volunteers in the activities of the service

Before, I worked as a volunteer has participated in the active services

Before, I many times started this active service work as the volunteer

Previously, I, as a volunteer on many occasions participated in the activities of the service

Before, I worked as a volunteer has participated in the active services