| 释义 |
up quark up quark n.Abbr. u（名词）缩写 uA quark with a charge of +&9{"/3} and a mass about 607 times that of the electron. It is a component of protons and neutrons.See table at subatomic particle 上夸克：一夸克，其带有+&9{"/3}电荷和一个电子的607倍的质量。它是构成质子和中子的成分之一参见 subatomic particle |