众所周知，对称性破缺与夸克禁闭问题是理论物理中悬而未决的两大疑难。

It is well known that symmetry breaking and quark confinement are two open problems in theoretical physics.

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众所周知，对称性破缺与夸克禁闭问题是理论物理中悬而未决的两大疑难。

It is well known that symmetry breaking and quark confinement are two open problems in theoretical physics.

youdao