Therefore, construct a weak doublet: \( \begin{pmatrix}\nu_e\\ e \end{pmatrix}_L\), \(\begin{pmatrix}\nu_\mu\\ \mu \end{pmatrix}_L\), \(\begin{pmatrix}\nu_\tau\\ \tau \end{pmatrix}_L\), \(\begin{pmatrix}u\\ d' \end{pmatrix}_L\), \(\begin{pmatrix}c\\ s' \end{pmatrix}_L\), \(\begin{pmatrix}t\\ b' \end{pmatrix}_L\)
