The cold-heat cycle underground is closely related to the hydrogeological characteristics of various rock and soil stratum (aquifer) when groundwater source heat pump system is running.

地下水源热泵系统运行期间，地下冷热量循环过程与地下不同岩土层（含水层）的水文地质特征密切相关。

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An example of heat cycle calculations for a type 51-50-3 turbine is presented.

文中还附有对51-50-3型汽轮机所作的一些计算结果。

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Somewhere between day 21 and 28, a queen will act as if she's returning to a heat cycle.

在第21天到28天之间，母猫会表现得好象又进入了发情期。

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You couldn't just run something successfully in a cycle and get work out of it, using the heat from the hot reservoir, without also converting some of the heat that came in to heat that would flow into a cold reservoir.

如果一样东西在循环工作过程中,只有热从高温热源中流出，而没有热流入低温热源，那么此过程,不可能对外做功,不可能把所有热。

麻省理工公开课 - 热力学与动力学课程节选

There's no change in them, and then we also looked at some at non-state functions, work and heat, and saw that those aren't zero going around a cycle. Of course you can do work in a cyclic process, and heat can be exchanged with the environment at the same time.

它们不会有变化，然后我们研究了,一些非态函数，功和热量，并看到,沿着循环行进一周的话,它们并不是零，当然你可以在,一个循环过程中做功，而同时热量可以在系统,与外界环境之间进行交换。

麻省理工公开课 - 热力学与动力学课程节选

It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.

让它与大气接触冷却,改变约束，使它继续冷却，然后又再次加热,这就是循环热机，我们以前也研究过，更复杂的机器。

麻省理工公开课 - 热力学与动力学课程节选

Most of the heat over corporate contributions during this election cycle has been generated not by PACs but by corporate donations to outside organizations that are trying to influence federal elections, but which aren't required to disclose their sources of funds.

WSJ: Honeywell Takes the Lead in Political Giving

"An air-conditioning unit is just the physical manifestation of the Carnot Cycle - which is talking about heat exchange between two closed systems, " he droned.

BBC: Daily house goss: week four

The Greeks tend to forget their politics in the numbing heat of August, but the country remains trapped in a cycle of decline, with a shrinking economy and rising unemployment.

BBC: Europe: Dangerous eurozone limbo