虽然不过三周而已，但大型强子对撞机的铅——铅对撞实验已经排除了一些有关早期宇宙状态的理论。
Although it's only been three weeks, the lead-lead collision experiments in the LHC have already ruled out some theories about how the early Universe behaved.
这项成果是基于，在大型强子对撞机在2010年最后两周的运行期间，对其收集的数据进行的分析，当时这台原子对撞机改换成氢质子对铅离子的碰撞。
The results are based on analysis of data collected during the last two weeks of the 2010 LHC run, when the atom smasher switched from colliding hydrogen protons to lead-ions.
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