Sandy is no ordinary storm.

"Now, Sandy is an example of what we call a hybrid storm. It works on some of the same principles as the way hurricanes work but it also works on the same principles as winter storms work. Hurricanes and winter storms are powered by completely different energy sources. The hurricane is powered by the evaporation of sea water. Winter storms are powered by horizontal temperature contrasts in the atmosphere. So hybrid storms are able to tap into both energy sources. That’s why they can be so powerful."

要比就蘋果和蘋果比吧. 美國沒有說SANDY是幾級的. 你先查查.