恒定不变的的英文怎么说

恒定不变的的英文：
constant

Nature produces them only very slowly, parsimoniously, and at a constant rate
但大自然太吝啬了，总是以一个恒定不变的却又是太慢的速度造就着这种天才。

For incompressible fluids, both the mass flux and the volume flux are constant in a tube of flow
对于不可压缩的流体来说，流管中的质量通量和体积通量都是恒定不变的。

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。