Personalities have to mesh and that takes time, trial and often error.
As with all things of this sort, it takes trial and error plus patience.
Ad executives say that new forms of advertising take trial and error.
But the process can take trial, error, and time.
"I can see it would take a long time, trial and error," Susan said.
It may take trial and error to find the right drug and dose.
It often takes trial and error to find the treatment that works best for you.
Sometimes it takes trial and error to come up with just the right treatment, so be patient.
It can take trial and error to find the food that works best for you, but these low-fiber, nondairy recipes may help.
It takes trial, error and experience to figure out the idiosyncrasies of each machine.
