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第1行： − 此词条暂由趣木木翻译，翻译字数共549，由Fernando审校。 − {{Use American English|date = March 2019}} − − {{Short description|Physical process transitioning a system from a symmetric state to a more ordered state}} − − {{otheruses}} − − − − {{expert|Physics|reason=Lacking. It discusses symmetry breaking like a dictionary without saying why its so critically important in nearly every field of physics. Does not even discuss [[Noether's theorem]] here or in subpages. Originally set in May 2014|date=October 2020}} − − − − [[File:Spontaneous symmetry breaking from an instable equilibrium.svg|thumb|A ball is initially located at the top of the central hill (C). This position is an unstable equilibrium: a very small perturbation will cause it to fall to one of the two stable wells left (L) or right (R). Even if the hill is symmetric and there is no reason for the ball to fall on either side, the observed final state is not symmetric.]]
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