The neutrino mass, which plays an important part in particle physics, cosmology and astrophysics, was a problem unsolved at the end of the 20th century.
中微子的静质量是2 0世纪末物理学中一个有待解决的重要问题，它在粒子物理学、宇宙学和天体物理学中占有重要的地位。
The neutrino mass, which plays an important part in particle physics, cosmology and astrophysics, was a problem unsolved at the end of the 20th century.
中微子的静质量是2 0世纪末物理学中一个有待解决的重要问题，它在粒子物理学、宇宙学和天体物理学中占有重要的地位。
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