空调系统维持恒定的温度。

Geo-thermal heating and cooling maintain constant temperatures.

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因此经常要调整控制钮，以维持恒定的输出压力。

Thus, frequent adjustment of the control knob is required to maintain constant delivery pressure.

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在跑长途时维持恒定的车速常常能省油赶紧加装一个吧。

Maintaining a constant speed over long distances often saves gas.

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Well that process of control to maintain a constant environment inside our body, whether it's an environment of constant mass or constant composition, or constant temperature, is called homeostasis.

这个控制过程维持着,体内环境的恒定,不论是内环境中物质的量的稳定,或者成分的稳定,或温度的稳定,这种状态叫做内稳态

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