A patented compensator automatically adjusts the valve position to hold constant outlet pressures at all flow rates.

专利补偿器自动调整阀的位置来保持任何流速下的出口压力。

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Varies the generator terminal voltage in accordance with its load to hold constant voltage at some point electrically remote from the generator, such as the station high voltage bus.

按发电机的负荷改变发电机的端电压使远离发电机的某一电气点如变电站高压母线的电压稳定不变。

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Because warm air can hold more moisture than cool air, the relative humidity will be constant only if the amount of water vapor in the atmosphere increases as the temperature rises.

因为温暖的空气比冷空气能容纳更多的湿气，所以只有当大气中的水蒸气量随着温度的升高而增加时，相对湿度才会保持不变。

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So, for example, if we're to hold the time constant, this makes it a lot simpler of an equation, because what we can end up doing is actually crossing out this whole term here.

比如说，如果我们把时间,定为常数，这使得方程,大大简化，因为我们可以把,这一项划掉。

麻省理工公开课 - 化学原理课程节选

Other will avoid this outright retribution and simply hold salaries constant until inflation accomplishes the same end.

FORBES: Trickle-Down Taxation

IPAB's debts, the government's strategy is to hold them constant in real terms.

ECONOMIST: Mexican banks

One way to reduce health insurance subsidies is to eliminate the tax-exemption for employer-paid health insurance premiums, while simultaneously lowering other taxes to hold revenue constant.

CNN: Commentary: US health costs out of control