You can't afford to be careless in this experiment.
He tried the experiment again and again.
He carried on with his experiment.
The experiment confirmed his theory.
I experimented on animals.
That experiment was a failure.
I was not being taught to experiment or even to repeat experiments.
You can't be too careful when doing this experiment.
Furthermore, experiments were never carried out against the rules but were performed always well within them - otherwise they would not be recognized as experiments at all.
He is sure of succeeding in the experiment.
The scientist gave himself up to his experiment.
The experiment proved to be successful.
But "experiment" is not the appropriate word.
He was the first to carry out the experiment.
The experiment was successful.
He persisted in the experiment until he was successful.