I'm a bit confuse. In chapter 15, of Conceptual physics by Paul Hewitt: "Temperature is related to the random motion of atoms and molecules in a sub- stance. (...) More specifically, temperature is proportional to the average “trans- lational” kinetic energy of random molecular motion (motion that carries the molecule from one place to another). Molecules may also rotate or vibrate, with associated rotational or vibrational kinetic energy—but these motions are not translational and don’t define temperature." In solid with only vibracion, we have absolute zero? I think most solids do not have translational kinetic energy.... Can you help me understand this?