Most processes that we're concerned with will happen with something held constant like pressure or temperature or volume.
我们关心的大多数过程都是在保持压强、温度或体积不变的情况下发生的。
It was not a time of uniform warmth, for then, as always since the Great Ice Age, there were constant shifts in rainfall and temperature.
那并不是一个始终温暖的时期，因为在那时跟大冰期以来的任何时候都一样，降雨量和温度都在不断变化。
The shallow seas on the continents probably buffered the temperature of the nearby air, keeping it relatively constant.
大陆上的浅海可能减轻了附近空气所受的影响，以保持其相对稳定的温度。
The body feels hot and the temperature remains more or less constant at the new elevated level.
身体感到热，可体温保持在升高后的新高度上差不多稳定不变。
For the Earth to maintain a constant average temperature, such emissions from the planet must balance incoming solar radiation.
为了使地球保持恒定的平均温度，来自地球的这种辐射必须平衡入射的太阳辐射。
So much of what we do in chemistry does take place with constant temperature and pressure.
我们在化学中所做的很多都是在恒定的温度和压强下进行的。
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。
Constant temperature means isothermal, so this part means an isothermal process.
等温“指温度不变，这部分就是指一个等温过程。”
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。
Then by chain rule, dpA/dp dpA/dP. Constant temperature.
考虑链式法则，还应该再乘以恒定的温度下的。
And I haven't written it in, but all of these are at constant temperature, right?
虽然我没有写出来，但是这些都是在恒定温度下的，对吗？
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。
To ask questions like how much heat is released in a chemical reaction that takes place at constant temperature.
当我们想要知道，当一个化学反应在恒定的温度下发生时，会放出多少热量时。
This circulation gets moreor less switched off at night when the temperature gradients disappear or reverse, avoiding heat loss and keeping the nest at a roughly constant temperature.
夜间当温度变化消失或是与白天截然相反时，巢内空气循环减弱，有效避免热流失，使得巢穴室温保持稳定。
That is, if we take the derivative G of delta G of mixing the partial derivative with respect to pressure, at constant temperature, of course, there's no explicit pressure dependence.
就是说，如果我们对,混合物的△,对压强求导，温度不变，当然，不是对压强的显函数。
So for an ideal gas then, dH/dp under 0 constant temperature, that has to be equal to zero.
所以对于理想气体,偏H偏p在恒温下，等于。
So we already know that. So now we can write CpdT or differential dH as Cp dT plus dH/dp, pdp constant temperature, dp.
我们已经知道了这个，所以我们现在,可以写出H的微分式：dH等于，加上恒温时的偏H偏。
The inside of a termite mound stays at near-constant temperature and humidity, no matter how wet, dry, scorching or freezing it might be outside.
不管外面的天气是潮湿还是干燥，是炙热还是严寒，白蚁巢穴的内部都可以保持恒温恒湿。
For even greater efficiency consider buying a tankless water heater. Tankless water heaters only heat water when it is needed, instead of keeping a reserve of water at a constant temperature.
购买无水箱热水器（电热水器）是更加节能的做法，电热水器只在需要的时候对水进行加热，而不会对保存在水箱内的水加热保温。
That is, the large bulk of the animals would have allowed them to maintain a fairly constant temperature even without a high metabolism.
也就是说，这些庞然大物即使没有较高的代谢水平，也能保持一个相当恒定的温度。
The above two kinds of devices can be in a dryer the flow of compressed air cooling to constant temperature and avoid a cold and led to excessive condensing liquid produce.
上述两种装置都可以将干燥器中一定流量的压缩空气冷却至恒定的温度，避免过冷而导致过多的冷凝液体产生。
Then the suspension of pl was mixed with HA solution and the complex was obtained after stirring under a constant temperature for a definite time.
即首先利用薄膜分散超声破碎法制备pl水分散液，然后与HA的水溶液混合，恒定温度搅拌一定时间得到复合物。
The finite element model was established based on the small punch creep test of SS304 steel specimen in the condition of constant temperature and different loads.
对304不锈钢进行了恒定温度下多种载荷的小冲孔蠕变试验，在此基础上建立了304不锈钢小冲孔蠕变试样的有限元模型。
Thermal comfort exists if the human body in thermal equilibrium with its environment, implying a constant temperature of the body.
若人体与环境达成热平衡，以保持体温恒定，就谓之具有热舒适性。
The thermostat's main job is to allow the engine to heat up quickly, and then to keep the engine at a constant temperature.
节温器的主要任务是使发动机迅速预热，然后使发动机保持一个恒定的温度。
Thermal mass flow sensor has unique constant temperature principium as mathematical model for measuring medium mass flow without compensation of temperature and pressure.
采用独特的恒温原理建立数学模型，测量出介质的质量流量，无须温度和压力补偿。
Thermal mass flow sensor has unique constant temperature principium as mathematical model for measuring medium mass flow without compensation of temperature and pressure.
采用独特的恒温原理建立数学模型，测量出介质的质量流量，无须温度和压力补偿。
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