The phenomenological constraints on the down-quark mass matrix in the weak interaction base were investigated.

在夸克的弱相互作用基下，得到了下夸克质量矩阵的唯象约束条件。

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In our universe, the down quark is about twice as heavy as the up quark, resulting in neutrons that are 0.1 percent heavier than protons.

在我们的宇宙中，底夸克的质量大约是顶夸克的两倍，造成中子比质子重大约0.1%。

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When you go below atomic size and get down to quarks, you drop off the periodic table and start playing with James Joyce who coined the word "quark."

当你从原子那么大再想到夸克，放下元素周期表跟发明了“夸克”这个词的詹姆斯 乔伊斯一起玩儿。

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