美国的粒子物理学家在探索为何现行的宇宙主要由正物质组成的过程中又进了一步。
US particle physicists are inching closer to determining why the Universe exists in its current form, made overwhelmingly of matter.
一个偶然的发现使地震学家在预测地震的能力上又进了一步。
An accidental discovery has brought seismologists one step closer to being able to predict earthquakes.
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