не отступать от своей цели(He was emaciated, dehydrated and suffering from a severe case of mange. His rescuers knew it would take a while before he was fully healed, but they were committed to making sure he got there eventually.ART Vancouver)
неустанно стремиться(sth.- к чему-л. • For twenty-five years we have been committed to bringing top-quality medical care to our patients. -- неустанно стремимсяART Vancouver)
взявший на себя обязательство(I could not attend the debate because I was at a meeting with some senior voters living in the riding, which was planned prior to the notice of Tuesday night's debate. I am committed to attending the Board of Trade meet-and-greet next Monday." – взял на себя обязательство присутствовать на ...ART Vancouver)