not having the standard of living conditions, education, etc. that most people have

A new educational programme has been set up for economically disadvantaged children. 一个新的面向贫困儿童的教育计划已经设立。

people who do not have good living conditions, a good standard of education, etc., considered as a group

These measures are intended to help the disadvantaged. 采取这些措施旨在帮助弱势群体。