The FFT images given in Fig. are especially worth noting. We see that in addition to the two sets of 101 ̅ 0 Bragg spots defining a twist angle, there exist several extra spots especially in the inner region of the 101 ̅ 0 spots, which are located symmetrically with respect to the center spot. These extra spots have not been explicitly reported in previous HRTEM observations on MSLs. We also found that these extra spots are not observed in the TEM image of the twisted hBN layers with hydrocarbon adsorbates (Fig. ). This allows us to expect that clean and contaminant-free samples are necessary for the observation of the extra diffraction spots.