宇宙射线撞击地球，携带着大量的高能粒子；其能量是现存最大加速器所产生能量的4千万倍以上。
Cosmic rays bombard the Earth from space and include particles of astounding energy, 40m times more powerful than anything that physicists can create in the world's biggest accelerators.
现在仍然没有任何粒子加速器能够达到检测弦理论所需的高能。
And no particle accelerator yet exists that can attain the high energies needed to detect strings.
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