As electronic media sources have become more affordable and attainable, more people have access to local and international news and events.

attainable 是由动词 attain（获得、达到）加上形容词后缀 -able 构成的形容词，表示"可获得的、可实现的"。-able 后缀表示"能够...的"，所以 attainable 字面意思是"能够被获得的"。