[填空题]
Symmetry breaking occu nbnr2umw. )huh(,*fbsi d69ojc7lu1 (4lu8/9bmv cm,f mnao rs in the electroweak theory at about $10^{-18}\ \text{m}$. Show that this corresponds to an energy that is on the order of the mass of the W boson ($M_W c^2 \approx 80\ \text{GeV}$). $mc^2$$\approx$ GeV
