Now astrophysicists have put a best-guess upper limit on the mass of the neutrino.

现在，天天物理学家对中微子的质量上限作出了一个最佳测定。

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This is the strongest limit to the mass that we have so far.

这是目前对物质了解的最大障碍。

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This is the strongest limit to the mass that we have so far.

这是目前对物质了解的最大障碍。

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