Anyway, it's nice cold we have here because we don't havewind. When it gets down to minus 40c I like to walk to work.
不管怎样，这儿的寒冷因为没有风而并不可怕，在零下40度的时候我还是喜欢走着去上班。
3
Because, if you have a curve in space and say that you havewind or something like that, you cannot really ask how much air is flowing through the curve.