物理學中時空經常是放在一起談的,所以才有spacetime這個詞, spacetime是個時空一體的數學模型。「In physics, spacetime (or space–time, space time) is any mathematical model that combines space and time into a single continuum. Spacetime is usually interpreted with space as being three-dimensional and time playing the role of a fourth dimension that is of a different sort from the spatial dimensions.」
但這不意味著只有空間彎曲而沒有時間彎曲。
看看discovery channel的這篇文章,也是時間彎曲:Time Warps: An Everyday Occurrence.
time warp: A hypothetical discontinuity or distortion occurring in the flow of time that would move events from one time period to another or suspend the passage of time.