I have worked out on and off since the age of 15 (now 25) and I am working on making permanent changes in my life, fitness being one of them. (fitmole.org)
At the time of my baby's birth, we were getting ready for our family's first permanent change of station (my husband is a member of the military). (romper.com)
In an apartment, you can't make permanent changes to the ventilation, of course. (effectivecoverage.com)