单词 | down quark |
释义 | down quark down quark n.Abbr. d(名词)缩写 dA quark with a charge of &9{-}&9{!/3}, a mass about 607 times that of the electron, and a downward spin. It is a component of protons and neutrons.See table at subatomic particle 下夸克:电荷为&9{-}&9{!/3}的夸克,质量是电子的607倍,有向下的旋转动量。下夸克是质子和中子的组成部分参见 subatomic particle |
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