The translational modes of both models align well with the experimental results. The DPMD peaks at 53.0 cm -1 while the SPC/Fw model peaks at 42.4 cm -1 . Additionally, both models exhibit a shoulder around 100 cm -1 to 300 cm -1 . This result supports the recent argument by Hölzl et al., who address that translational diffusion has little impact on dielectric loss. In addition to the tetrahedral order, these results again question the commonly believed picture about the linkage between the tetrahedrality and the relaxation phenomena in water, considering that the tetrahedral order strongly correlates to the translational order .