Some With No Heat 其中一些没有供热
He and his team grew tiny polystyrene spheres until they were some 200 nanometres across, before hardening them with a blast of heat.
他和他的团队,先培育聚苯乙烯球直到它们的直径为200纳米,再用一股强热将其硬化。
Rising sea levels, increasing salinization of water tables, and heat stress in association with air pollution are just some of the consequences of great concern in this part of the world.
海平面不断上升,潜水层日益盐化,以及与空气污染有关的热应力只是这个区域极令人担忧的一部分后果。
He turned on the fan after he'd started up the engine, to give it some heat-but then it was a mammal, he figured, with fur, and it could warm itself.
汽车发动着后,他打开暖风,给箱子里的动物增加点热量——不过,他想这是哺乳动物,有皮毛,而且它自己能够取暖。
It's just how much heat is involved when we change the temperature. Now, the products have some heat capacity associated with them right, it takes a certain amount of heat if we make their temperature change, to either put it in or take it away, depending on which direction the temperature is changing.
问题就是当我们改变温度时,有多少热量发生了转移,生成物具有一定的热容,如果我们改变,它们的温度,就要输入或,提取一定的热量,这取决于温度改变的方向。
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。
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