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。

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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）。

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Hydrogen peroxide powers the arm for 18 hours of normal activity.

过氧化氢提供的能量可以支持义肢18个小时的正常使用。

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The reaction Mr Lerner proposes would break up boron atoms by hitting them with protons (the nuclei of normal hydrogen atoms).

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It consists of 1, 000 tonnes of heavy water (the sort that has deuterium, a heavy form of hydrogen, in its molecules, instead of the normal, light form of the element).

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