Whereas under these conditions, these quantities, if you look at free energy change, for example at constant temperature and pressure, H you can still calculate H.
但是，在这些条件下，这些物理量，如果我们考察自由能的变化,例如在恒定的温度和压强下，我们仍然可以计算。
It's a state function, so we're at constant temperature and pressure, and now we want to consider some chemical change or a phase transition or you name it.
这就是态函数，我们处于恒定的温度和压强之下，然后考虑某些化学变化或者相变，或者你想考虑的东西。
Dealing with constant change and pressure is part of the answer.
应对复杂多变的情况和压力可能是部分原因。
If that changes, of course you know that the pressure in there is going to change at constant volume if the amount of gas in there is changing.
如果它发生了变化，当然在等体条件下，如果气体的总量，发生了变化，压强也会发生变化。
So I need, well the pressure is constant, but there's a change in volume.
压强不变，体积变化。
The darkness did not change, and neither did the constant pressure enfolding her.
黑暗毫无变化，包裹着她的持续的压力也是如此。
The pressure compensating emitters which have the advantages of constant flow under the change of pressure, anti-clogging and self-cleaning performance have been the hotspot in research in the world.
压力补偿滴头具有出水流量不受压力变化影响、抗堵性较好、具有自冲洗功能等优点，已成为世界各国研发的热点。
The change in gas temperature that occurs when the gas is expanded at constant enthalpy from a high to low pressure.
当气体从高压到低压在等熵下膨胀时所产生的气体温度的变化。
Using the data of the condensate content change with pressure in constant-temperature, the distributive characterization is defined under producing.
利用凝析气藏等温衰竭过程中凝析油含量与随压力变化的数据确定出开采过程中储层内凝析油含量的分布特征。
Using a home-made constant-volume oxygen-bomb combustion apparatus, the change of gas pressure with combustion time of coal samples in oxygen-bomb were investigated.
在自制的定容氧弹燃烧装置上， 测量了多种煤样在氧弹内燃烧期间气体压力随燃烧时间变化的关系。
Using a home-made constant-volume oxygen-bomb combustion apparatus, the change of gas pressure with combustion time of coal samples in oxygen-bomb were investigated.
在自制的定容氧弹燃烧装置上， 测量了多种煤样在氧弹内燃烧期间气体压力随燃烧时间变化的关系。
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