恒量用英文怎么说

恒量的英文：
constant

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。