It is a nearly static theory.

这是一条几乎一成不变的理论。

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Such a slow compression carries the gas through a series of states.each of which is very nearly an equilibrium state and it is called a quasi-static or a“nearly static”process.

这样的缓慢压缩能使这种气体经历一系列的状态，但各状态都很接近于平衡状态，所以叫作准静态过程，或“近似稳定”过程。

youdao

Such a slow compression carries the gas through a series of states. each of which is very nearly an equilibrium state and it is called a quasi-static or a "nearly static" process.

这样的缓慢压缩能使这种气体经历一系列的状态，但各状态都很接近于平衡状态，所以叫做准静态过程，或“近似稳定”过程。

youdao

In reaction to the pyrotechnics of bebop, with its blizzards of notes and relentless complexities of harmony, Davis presented an ascetic simplicity, with spare melodic improvisations over modal harmonies so static they nearly drone.

WSJ: Mercurial Charles Mingus | Mingus Ah Um | Masterpiece by Eric Felten