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单词 低温学
释义 〔cryogenics〕The production of low temperatures or the study of low-temperature phenomena. Also called cryogeny 低温学:以低温现象为研究对象的学科 也作 cryogeny〔helium〕A colorless, odorless inert gaseous element occurring in natural gas and with radioactive ores. It is used as a component of artificial atmospheres and laser media, as a refrigerant, as a lifting gas for balloons, and as a superfluid in cryogenic research. Atomic number 2; atomic weight 4.0026; boiling point -268.9°C; density at 0°C 0.1785 gram per liter. See table at element 氦:自然界天然气体或放射性矿石中一种无色、无味的惰性气体状成分。用作人造大气层和镭射媒体的组成部分,和用作制冷剂及飞行气球的气体,还在低温学研究中用作超流体。原子序数2;原子量4.0026;沸点-268.9°C;浓度在0°C时为每升0.1785克 参见 element〔physics〕(used with a sing. verb)Abbr. phys.The science of matter and energy and of interactions between the two, grouped in traditional fields such as acoustics, optics, mechanics, thermodynamics, and electromagnetism, as well as in modern extensions including atomic and nuclear physics, cryogenics, solid-state physics, particle physics, and plasma physics.(与单数动词连用)缩写 phys.物理,物理学:有关物质和能量及两者之间相互作用的科学,传统上分为声学、光学、机械学、热力学和电磁学,现今又扩展到包括原子物理、核物理、低温学、固体物理学、微粒物理学和等离子体物理学
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