比方说，质子是由两个上夸克（up quark）和一个下夸克（down quark）组成的束缚态，而奇异粒子只不过是含有奇异夸克（strange quark）的束缚态。（然而，我们不可能观测到单个夸克或胶子。
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Down-Quark 下夸克
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%。
Jaffe and his colleagues modeled one family of universes in which the down quark was lighter than the up quark, and protons were up to a percent heavier than neutrons.
Jaffe和他的同事建立了一个类型的宇宙，其中底夸克比顶夸克轻，而质子比中子重1%。
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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