You have been selected to take part in an important experiment.

The following is a list of historically important scientific experiments.

Many important governmental experiments were being tried here, so the security was tight.

"On the other hand, nobody would deny that these are important experiments with great potential."

"The most important scientific experiment in human history is at stake."

This is an important experiment, and I wouldn't like anything to go wrong.

This is possibly the single most important experiment ever conducted.

The Commission has already begun an important experiment in this area.

"Then, I was delighted to take part in an important social experiment."

Some experts said that would be an important experiment to carry out.