常数用英语怎么说

常数的英文：
const
constant
invariable

• The speed of light is an important constant.
  光速是一个重要的常数。
• The speed of light is an invariant constant
  光速是一个不变常数。
• The fourth-rank tensors contain the compliance and stiffness constants
  四秩张量包含柔量常数和刚度常数。
• The permeation constant of gases through metals is negligible except for hydrogen through palladium or iron.
  除了氢气能穿过钯和铁之外,气体穿过金属的透气常数是可以略而不计的。
• Pi is a constant.
  圆周率是个常数
• Piezoelectric stress constant
  压电应力常数
• Piezoelectric voltage constant
  压电电压常数
• Piezoelectric stiffness constant
  压电劲度常数
• Growth is a function of turgor
  生长是膨胀的一个常数。
• The speed of light is an invariant constant.
  光速是一个不变常数。

• 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。

• Our radical policy is invariable.
  我们的基本政策是不变的。
• Something that is unchanging or invariable.
  不变的事物持久不变或始终如一的事物
• The speed of light is an invariant constant.
  光速是一个不变常数。