时空几何

众所周知研究天体的短程线轨道在天体物理学中是极为重要的，而研究黑洞的时空几何最好的方法之一是研究黑洞时空的类时短程线和类光短程线。

It is well known that it is extremely important for astrophysics to understand the space-time geometry around a black hole , one of the best way is to study the time-like and null geodesics of the black hole .

弯曲时空几何光学中的聚焦定理

Focusing theorem of geometric optics in curved space-time

严格、详细地证明了弯曲时空几何光学中的聚焦定理。

The focusing theorem of geometric optics in curved space-time be proved strictly and in detail .

科学统一论的发展是从地面力学与天体力学的统一、光电磁场的统一、时空几何与引力理论的统一，到四种基本作用力的统一。

Scientific unity theory is developed from the unity of earth mechanics with space mechanics , the unity of light , electricity and magnetic field , the unity of time-space geometry and gravitational theory to the unity of four basic action forces .

没错，时空的几何结构规定了地球围绕太阳公转的轨道。

Exactly , the geometry of space-time tells the Earth how to move around the Sun .

正是时空本身的几何结构，让行星停留在各自的轨道上，让苹果落到地上。

it was the geometry of that space-time itself that kept the planets in their orbits and apples falling .

对四度时空坐标的几何图像给以量化的描述，将洛伦兹变换与坐标的旋转对应起来。

A graphic image of a frame of four dimensional time space is described quantitatively and a rotation of the frame is paralleled with Lorentz transformation .

基于时空连贯性和几何简化技术的复杂场景快速消隐绘制算法

A Quick Rendering Algorithm Based on Space Coherence and Geometry Simplification