I've spent nearly my entire life studying animals, but eventually put all my focus on dogs and their behaviors. (argosdogworks.com)
Other people who have spent their professional lives studying the problems do the actual work. (legalinsurrection.com)
I've spent most of my adult life studying health and nutrition, and incorporating what I've learned into my personal diet, as well as sharing this information with my readers. (liveinthenow.com)