[jupiter90000]

If the position requirements describe certain things they want and you have done those things at certain jobs, basically say that you have done what they are asking for at those jobs. Things like "work on multitier web application" or other items that are not stack specific but that you have done. Include text closely matching those descriptions at jobs where you've done it.

If you don't have the experience I don't know how you'd craft it to be honest except for perhaps being descriptive in the cover letter about how you don't match everything but what you are able to offer and why you may be excited to work in the specific role at the company.