Rather than focusing on experience in a particular job, detail your abilities as demonstrated in that job in such a way as to show that they are transferable to the job applied for. (cvtips.com)
Once again claim your interest in the particular job profile. (bestcoverletters.com)
Keep the other two positions brief, emphasizing the parts of them that will help you succeed in this particular job. (blog.gojobhero.com)