If a scalar field changes slowly, it resembles a constant, both in its fixed magnitude and in its lack of directionality; relativity theory predicts it will produce a gravitational repulsion.

• 如果纯量场变化缓慢，它就会有固定的大小，而且没有方向性，就像一个常数一样；相对论预测，这种情况会产生重力排斥效应。