格朗萨索实验室测到的中微子来自欧洲核子研究中心的质子粒子束。
The neutrinos that emerge at Gran Sasso start off as a beam of proton particles at Cern.
大型强子对撞机在位于日内瓦附近欧洲粒子物理实验室的欧洲核子中心。从周末开始，物理学家们在LHC周长为27公里的圆环内，开始质子束流的调束工作。
Over the weekend, physicists began circulating beams of protons around the 27-kilometre ring of the Large Hadron Collider (LHC) at CERN, Europe's particle-physics laboratory near Geneva, Switzerland.
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