Acting as raw materials that can be converted to other substances that perform special duties in your body such as hormones. (articles.mercola.com)
An ambassador at Large is an ambassador with special duties not appointed to a particular country. (ghanapoliticsonline.com)
It is a good idea to start the process on a piece of scratch paper, listing your relevant work experiences and as many achievements / special duties as possible under each. (copymyresume.com)