A deuterium atom is a hydrogen with an extra neutron in its nucleus.
重氢是原子核中多一个中子的氢。
But sometimes a cosmic ray will collide with a nitrogen atom, giving it an extra neutron.
但有时宇宙射线会撞击氮原子，赋予它一个额外的中子。
Most current fusion efforts look to combine two atoms of deuterium, a heavier version of hydrogen with an extra neutron.
最流行的聚变做法是将两个氘原子结合在一起——氘是带有一个额外的中子的重氢。
The researchers used what's called an ion microscope to compare the amount of normal hydrogen in the moon rocks to the amount of the hydrogen isotope deuterium, which carries an extra neutron.
研究人员利用所谓的离子显微镜来比较月球岩石中正常的氢元素含量及同位素氘的含量，元素氘比氢多带一个中子。
The researchers used what’s called an ion microscope to compare the amount of normal hydrogen in the moon rocks to the amount of the hydrogen isotope deuterium, which carries an extra neutron.
科学家用到了一种叫离子显微镜的仪器，来比较月球岩石上氢的含量与重氢含量（重氢比普通氢多带有一个中子）。
MCNP is an advanced general purpose and extra large coupled neutron photon Monte Carlo transport code system. It has very wide range of application.
MCNP是一个超大型、先进的多功能蒙特卡罗中子-光子耦合输运程序，在世界范围内得到了广泛的应用。
MCNP is an advanced general purpose and extra large coupled neutron photon Monte Carlo transport code system.
MCNP是一个超大型、先进的多功能蒙特卡罗中子-光子耦合输运程序，在世界范围内得到了广泛的应用。
The terms for the effects of the neutrons reflected back from outside the reactor are added as extra delayed neutron terms to the reactor kinetics equation.
在反应堆动力学方程中，考虑了堆体外反照中子效应，将其作为模拟缓发中子处理。
The terms for the effects of the neutrons reflected back from outside the reactor are added as extra delayed neutron terms to the reactor kinetics equation.
在反应堆动力学方程中，考虑了堆体外反照中子效应，将其作为模拟缓发中子处理。
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