Definition

Examples

• 光速每秒约三十万公里。
  guāng sù měi miǎo yuē sān shí wàn gōnglǐ.
  The speed of light is about 300,000 kilometers per second.
• 科学家们一直在研究如何达到光速。
  Kēxuéjiā men yìzhí zài yánjiū rúhé dádào guāng sù.
  Scientists have been studying how to reach the speed of light.
• 在宇宙中，没有什么比光速更快。
  Zài yǔzhòu zhōng, méi yǒu shénme bǐ guāng sù gèng kuài.
  In the universe, nothing is faster than the speed of light.