研究证明，光速在局域内具有绝对不变的一面，但在局域间又具有相对变化的另一面，随空间相对变化的光速是产生重力加速度g的物理原因， g=-(dc^2)/ds ，在10m空间范围内，光速仅相对变化了△C = -0.000000166782 (m/s) ，就可产生g = 10 m/s²的重力加速度，这是一个令人难以置信的结果。光速变化的原因，是物体质量对真空物理性质μ_0 ε_0的影响，物体的质量使μ_0 ε_0随空间发生变化，尽管也是一个非常微小的变化量，同样使空间中的物体具有了高低能量状态之分，物体就会自发地朝低能态方向运动，在这样的空间中，物体等效于受到了一个重力F_m的作用，F_m=-m_0 (dc^2)/ds。本文解释了空间如何传导引力的物理机制问题，同时也解释了时空弯曲的物理机制问题。

It has been proven in studies that the speed of light remains absolutely constant within a local area, but relative changes in the speed of light can occur between different local areas. The speed of light that changes with space is the physical factor responsible for the generation of gravitational acceleration g ( g=−(��������^2)/�������� ). Within a range of 10 m, it is possible to generate a gravitational acceleration g = 10 m/s² with only a relative change in the speed of light at △ C=-0.000000166782 (m/s), which is a remarkable feat. The change in the speed of light can be attributed to the influence of the mass of an object on the physical properties of vacuum μ0ε0, which changes it with space. Although it is a minor change to the object in space, it results in the establishment of high and low energy states, and consequently, the object will spontaneously move towards the low energy state. In such a space, an object is equivalent to being subjected to the action of gravity ��������, and ��������=−����0��������2��������. In this article, the physical mechanism of the conduction of gravity in space and the physical mechanism of space-time curvature are explained.