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。