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One of the constituents of atoms. Along with the proton, the neutron is found in the nuclei (centers) of atoms. Neutrons have no electric charge, and are composed of two down quarks and an up quark.

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行业/领域：物理
类别粒子物理学
Company: 伯克利
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Dragan Zivanovic

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行业/领域：医学类别肠胃病学

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A disease that occurs when the body absorbs too much iron or receives many blood transfusions. The body stores the excess iron in the liver, pancreas, ...