Or you could say that light propagates at the speed of gravitational waves: Gravity determines the structure of spacetime, which in turn determines how things can move.Including light.

• 或者你也可以说是光是以引力波的速度来传播的：因为引力决定了时空结构，而后者又决定了物质的移动方式，当然，这也包括光的传播。