M理论预测了超对称性的存在，超对称性认为所有基本粒子都存在伴粒子，这些伴粒子的名称都很奇特，比如超对称电子（selectrons）和超对称夸克（squarks）等，但到目前为止，科学家们还没有发现这种超对称性伴粒子。
One possibility predicted by M-theory is supersymmetry, an idea that says fundamental particles have heavy – and as yet undiscovered – twins, with curious names such as selectrons and squarks.
早在1960年，南部阳一郎提出了他的数学描述的对称性自发破在基本粒子物理学。
As early as 1960, Yoichiro Nambu formulated his mathematical description of spontaneous broken symmetry in elementary particle physics.
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