常速的英文怎么说

常速的英文：
constant speed

• Matter is in constant motion and constant change.
  物质总是在不断运动，不断变化的。
• A constant guest is never welcome
  常客令人厌
• The market is in a constant state of flux.
  市场行情在不断变化。
• The market is a stream that is in constant motion.
  市场像河流一样不断地波动。
• The speed of light is an invariant constant.
  光速是一个不变常数。

• The speed of a train differs greatly from the speed of an airplane
  火车的速度与飞机的速度大不相同。
• The car is gaining speed.
  那辆轿车正在加速。
• The worker is timing the speed of the machine.
  这名工人正在调整机器的速度。
• a dizzy height, speed
  使人眩晕的高度、 速度.
• Speed the parting guest
  祝客人一路顺风