XXX经常利用业余时间来我中心作义工，进行资料整理、法律知识宣传等基本工作，并且利用空闲时间学习各种法律知识，以便更好的做好义工的工作。
參考答案:***often takes his spare time to work in our center as a volunteer, organizing the material, propagandizing common knowledge on law, and some other basic work. his also study all kinds of knowledge on law when he is free in order to be a better volunteer.
