求翻译：（2） 劳动系统，包括各级劳动行政机关和就业服务机构，主要针对社会上的求职者和劳动后备力量进行职业指导；是什么意思？

(2) labour systems, including labour administration and employment services at all levels, is for job seekers and the labour reserve force in the community for vocational guidance;