Heat capacity, thermal mass flow resistance is small, stop the heat, long continued heating.
热容量大,热质流动阻力小,停热后持续。
Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise; that sudden rush of blood is what causes the headache.
头部的血管收紧以阻止身体热量的流失,然后放松让血液流动起来,血液的突然涌入是引起头痛的原因。
But most stars are not massive enough to create the pressures and heat necessary to burn heavy elements, so fusion and heat production stop.
不过大多数恒星都没有足够的质量以产生燃烧重元素所需的压力与热能,所以核聚变与热能产生过程都停止了。
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