求翻译：这是一种利他主义和慈善主义精神的发展标志,志愿者是在不为任何物质报酬的情况下，为改进社会而提供服务、贡献个人的时间及精神的人。是什么意思？

This is the development of a spirit of altruism and charity logo, volunteers are not for the case of any material remuneration, provided for the improvement of social services, people who contribute personal time and effort.