This could explain why no supersymmetric particles have been discovered, yet. Particle accelerators are presently not powerful enough to re-create the conditions that would allow us to produce such particles. Such conditions are thought to be similar to those which existed just after the Big Bang. A particle accelerator called Large Hadron Collider is now under construction in Geneva, Switzerland. It will not be operational until 2005, if everything goes well.
Superpartner particles are also possible candidates for the composition of dark matter.
There might be other explanations to this verse that we still have not thought about, or don't know about yet. Our knowledge today will not be similar to the knowledge we will have in the future. Of course, scientists, including physicists, are still doing a lot of research, and in the future, God willing, this verse will be fully explained in the light of our then newly acquired knowledge. Let us remember that in the 7th century, the Glorious Qur'an mentioned the expansion of the universe , a fact that was verified only some 1400 years after the Noble Qur' an was revealed. I chose a scientific approach to try to explain this verse, and both the Standard Model, and the Superstring theory should not be considered as the only way of understanding this verse.