| 单词 | carbon-nitrogen cycle |
| 释义 | carbon-nitrogen cycle【化】 碳-氮环 carbon-nitrogen cycle car.bon-ni.tro.gen cycle AHD: [kär”b…n-nº“tr…-j…n] D.J. [7k$8b*n6na!tr*d9*n]K.K. [7k$rb*n6na!tr*d9*n]n.Physics （名词）【物理学】 A chain of thermonuclear reactions in which nitrogen isotopes are formed in intermediate stages and carbon acts essentially as a catalyst to convert four hydrogen atoms into one helium atom with the emission of two positrons. The entire sequence is thought to generate significant amounts of energy in the sun and certain other stars.Also called carbon cycle ,nitrogen cycle 碳氮循环，碳循环，氮循环：热核反应链。氮同位素在此反应链的中间阶段形成，碳作为必不可少的催化剂把四个氢原子转化成一个氦原子，同时释放两个正电子。据推测，该循环的全部顺序在太阳和某些其它恒星上可产生数量可观的能量也作 carbon cycle,nitrogen cycle |
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