early 15c., from Latin velocitatem (nominative velocitas) "swiftness, speed," from velox (genitive velocis) "swift, speedy, rapid, quick," of uncertain origin, perhaps related to vehere "carry" (see vehicle), or from the same root as vigil.
实用例句
1. Acceleration and velocity are both vectors.
加速度和速度都是矢量。
来自《权威词典》
2. the velocity of light
光速
来自《权威词典》
3. Einstein's theory links energy with mass and velocity of light.
爱因斯坦的理论把能量同质量和光速联系起来.
来自《简明英汉词典》
4. The velocity of light is about 300000 kilometres per second.
光速约为每秒300000公里.
来自《现代汉英综合大词典》
5. A bullet goes from this gun with a velocity of 3000 feet per second.
