For example, on a 2-torus, one may envision a constant 1-form as one where all of the "hair" is combed neatly in the same direction (and all of the "hair" having the same length).
例如，在2-圆环上，一个常1-形式可以视为在一个形式，它所有的"毛"都整齐的梳到一个方向(而且所有的毛都一样长)。